But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. One component which gained a lot of attention was the password iterations count. "The default iteration count used with PBKDF2 is 100,001 iterations on the client (client-side iteration count is configurable from your account settings), and then an additional. anjhdtr January 14, 2023, 12:50am 14. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. I think the . Bitwarden also uses the PBKDF2 KDF, but as of this writing, with a more secure minimum of 600,000 iterations. Therefore, a rogue server. Therefore, a. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. A setting of KDF algorithm: Argon2id - KDF iterations: 8 - KDF memory (MB): 96 - KDF parallelism: 6 has always worked thus far. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Unless there is a threat model under which this could actually be used to break any part of the security. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Also make sure this is done automatically through client/website for existing users (after they. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. I increased KDF from 100k to 600k and then did another big jump. Kyle managed to get the iOS build working now,. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Another KDF that limits the amount of scalability through a large internal state is scrypt. Bitwarden users have always had the option to specify the number of iterations for their account, and 600,000 is now the default value for new accounts. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. I can’t remember if I. The current KDF, PBKDF2 uses little to no memory, and thus scales very well on GPUs which have a comparatively low amount o… Ok, as an update: I have now implemented scrypt for the mobile clients. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. What is your KDF iteration set to, in the bitwarden web vault settings? Reply diamondgoal. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). 2FA was already enabled. I would suggest getting in touch with tech support, in case there is anything they can do to diagnose or fix your problem. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Security Now podcast did a follow-up to the last episode on the LastPass debacle and one of the things that Steve Gibson mentioned is that vault providers need to move away from PBKDF2 and the number of hash iterations to an algorithm that is resistant to GPU attacks. We recommend a value of 600,000 or more. The client has to rely on the server to tell it the correct value, and as long as low settings like 5,000 iterations are supported this issue will remain. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. . I appreciate all your help. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. The user probably wouldn’t even notice. log file somewhere safe). With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. LastPass got in some hot water for their default iterations setting bein…Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. 8 Likes. It will cause the pop-up to scroll down slightly. You can do both, but if you're concerned about iterations being too low, add 1-2 extra chars. Our default is 100,000 iterations, the Min allows for higher performance at the user's discretion but the key length combined with the password still makes this. Memory (m) = . none of that will help in the type of attack that led to the most recent lastpass breach. 6. So I go to log in and it says my password is incorrect. Note:. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Therefore, a rogue server could send a reply for. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. . This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) =. app:web-vault, cloud-default, app:all. Low KDF iterations. Exploring applying this as the minimum KDF to all users. Palant said this flaw meant that the security level of Bitwarden is identical to what LastPass had. Unless there is a threat model under which this could actually be used to break any part of the security. In contrast, Dmitry Chestnykh wrote a well-researched piece in 2020 (with an update in January 2023) that describes exactly how a brute-force attack against a stolen Bitwarden vault would be possible using only 100,000 PBKDF2 iterations (or the KDF iteration value set by the user) per password guess, and even proposed an improved authentication. That seems like old advice when retail computers and old phones couldn’t handle high KDF. Ask the Community. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. json exports. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Among other. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Feb 4, 2023. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Click on the box, and change the value to 600000. On the typescript-based platforms, argon2-browser with WASM is used. Click the update button, and LastPass will prompt you to enter your master password. The user probably wouldn’t even notice. In the 2023. Exploring applying this as the minimum KDF to all users. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. Ask the Community. The user probably wouldn’t even notice. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. This setting is part of the encryption. Question about KDF Iterations. This article describes how to unlock Bitwarden with biometrics and. The recent LastPass breach has put a lot of focus on the number of PBKDF2 hash iterations used to derive the decryption key for the password vault. We are in the process of onboarding an organization and I would like to be able to set a security baseline by having a default KDF iteration count for all accounts on the organization level. If that was so important then it should pop up a warning dialog box when you are making a change. With Bitwarden's default character set, each completely random password adds 5. Exploring applying this as the minimum KDF to all users. rs I noticed the default client KDF iterations is 5000:. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. Bitwarden Community Forums Master pass stopped working after increasing KDF. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Changing my “KDF Iterations” in my Vault UI will change the value of client_kdf_iterations. Your master password is used to derive a master key, using the specified number of. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Now I know I know my username/password for the BitWarden. In contrast, Dmitry Chestnykh wrote a well-researched piece in 2020 (with an update in January 2023) that describes exactly how a brute-force attack against a stolen Bitwarden vault would be possible using only 100,000 PBKDF2 iterations (or the KDF iteration value set by the user) per password guess, and even proposed an improved authentication. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. ” From information found on Keypass that tell me IOS requires low settings. pub const CLIENT_KDF_ITER_DEFAULT: i32 = 5_000; Was wondering if there was a reason its set so low by default, and if it shouldn't be 100,000 like Bitwarden now uses for their default? Or possibly a configurable option like how PASSWORD_ITERATIONS is. My account was set to 100000 by default!! To change it log into your WebUI and go to Account > Security > Keys. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. It’s only similar on the surface. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Can anybody maybe screenshot (if. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Whats_Next June 11, 2023, 2:17pm 1. Bitwarden uses AES- CBC 256-bit encryption for your Vault data, and PBKDF2 SHA-256 to derive your encryption key. OK fine. 1 Like. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. kwe (Kent England) January 11, 2023, 4:54pm 1. The password manager service had set the default iterations count to 100,000 for new accounts, but many old accounts. From this users perspective, it takes too long for this one step when KDF iterations is set to 56. Exploring applying this as the minimum KDF to all users. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. The user probably wouldn’t even notice. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Password Manager. I have created basic scrypt support for Bitwarden. Exploring applying this as the minimum KDF to all users. Please keep in mind that for proper cracking rigs with a lot more GPU power the difference between PBKDF2 cracking and Argon2 cracking will be even greater!The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. My recommendation is to try to increase the KDF size (by 50k or 100k at a time) and then test it on all the devices you use Bitwarden on by logging out of the page/app and then log back. We recommend a value of 600,000 or more. The point of argon2 is to make low entropy master passwords hard to crack. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. At our organization, we are set to use 100,000 KDF iterations. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Both the admin web server side and my Bitwarden clients all currently show a KDF iterations value of 100000. Bitwarden Community Forums. The try it again with Argon2id, using the minimum settings for memory (16 MiB) and iterations (2. Remember FF 2022. Increasing KDF iterations will increase running time linearly. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. json file (storing the copy in any. Don't worry about changing any of the knobs or dials: just change KDF algorithm completely. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Exploring applying this as the minimum KDF to all users. You can just change the KDF in the. I was asked for the master password, entered it and was logged out. Then edit Line 481 of the HTML file — change the third argument. Code Contributions (Archived) pr-inprogress. Exploring applying this as the minimum KDF to all users. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. The user probably wouldn’t even notice. We recommend that you increase the value in increments of 100,000 and then test all of your devices. app:web-vault, cloud-default, app:all. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. We recommend that you increase the value in increments of 100,000 and then test all of your devices. Currently, as far as I know, Bitwarden is the only password manager that offers the ability to directly import their password-protected . If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. I think the . log file is updated only after a successful login. Palant said this flaw meant that the security level of Bitwarden is identical to what LastPass had. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. After changing that it logged me off everywhere. 2 Likes. Enter your Master password and select the KDF algorithm and the KDF iterations. One of the Hacker News commenters suggestions which sounds reasonable is to upgrade the user to the current default KDF iterations upon a change of the master password. Due to the recent news with LastPass I decided to update the KDF iterations. The default parameters provide stronger protection than 600,000 PBKDF2 iterations, and you may get the additional protection without any performance loss. With the warning of ### WARNING. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. This setting is part of the encryption. Great additional feature for encrypted exports. For scrypt there are audited, and fuzzed libraries such as noble-hashes. LastPass had (and still has) many issues, but one issue was allowing low iterations (1 or 500) on their KDF. 12. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Aug 17, 2014. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Yes and it’s the bitwarden extension client that is failing here. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Learned just now that for some old accounts the iterations in lastpass where set to 1, unbelievable , i set mine in Bitwarden to 1234567 iterations to stay ahead of the moving train called GPU hacking. All around great news and a perfect example of a product built on open source code actively listening to its community! Mastodon Post: Bitwarden Security Enhancements Respect. Unless there is a threat model under which this could actually be used to break any part of the security. The user probably wouldn’t even notice. Aug 17, 2014. Hey @l0rdraiden see earlier comments, including Encryption suggestions (including Argon2) - #24 by cscharf for more information. The user probably wouldn’t even notice. 1. 2 Likes. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Don't worry about changing any of the knobs or dials: just change KDF algorithm completely. We recommend that you. We recommend a value of 100,000 or more. 2 or increase until 0. grb January 26, 2023, 3:43am 17. It's set to 100100. 995×807 77. log file is updated only after a successful login. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. This is performed client side, so best thing to do is get everyone to sign off after completion. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. This means a 13char password with 100,000 iterations is about 2x stronger than a 12char password with 2,000,000 iterations. Go to “Account settings”. Now I know I know my username/password for the BitWarden. Now I know I know my username/password for the BitWarden. We recommend a value of 600,000 or more. feature/argon2-kdf. 3 KB. 1. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. ? Have users experienced issues when making this change to an existing Bitwarden account? I know the CYA answer is to always backup the data, which I would do, but I would like to be aware of any potential problems that might arise. Bitwarden Community Forums Argon2 KDF Support. Exploring applying this as the minimum KDF to all users. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Among other. Hey @Quexten we’re switching over to Github discussions to keep the PR chats closer to the code. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Keep in mind having a strong master password and 2FA is still the most important security aspect than adding additional bits of. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. The user probably wouldn’t even notice. 0 release, Bitwarden increased the default number of KDF iterations for accounts using the PBKDF2 algorithm to 600,000, in accordance with updated OWASP guidelines. A setting of KDF algorithm: Argon2id - KDF iterations: 8 - KDF memory (MB): 96 - KDF parallelism: 6 has always worked thus far. Parallelism = Num. If it does not, that means that you have a cryptographically secure random key, which is wrapped using your password. The back end applies another 1,000,000. Among other. Also, check out this Help article on Low KDF Iterations: and the KDF Iteration FAQ:. Remember FF 2022. The user probably wouldn’t even notice. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. The increase to 600k iterations is the new default for new accounts. Among other. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Anyways, always increase memory first and iterations second as recommended in the argon2 paper and iterations only afterwards. On the typescript-based platforms, argon2-browser with WASM is used. It's in rust and is easy to patch to permit a higher kdf max iteration count, and has the added benefit of not costing anything for use of the server. Scroll further down the page till you see Password Iterations. Therefore, I would recommend heeding Bitwarden's warnings about not exceeding 10 iterations. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Therefore, a rogue server could send a reply for. If a user has a device that does not work well with Argon2 they can use PBKDF2. It's set to 100100. Expand to provide an encryption and mac key parts. rs I noticed the default client KDF iterations is 5000:. More specifically Argon2id. ddejohn: but on logging in again in Chrome. 1. Click the Change KDF button and confirm with your master password. 12. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. The user probably wouldn’t even notice. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Do beware, Bitwarden puts a limit of 10 iteration rounds because in QA testing, it was unlimited, which lead to a tester having a 30 minute unlock time (1k+ iterations at 1GiB memory). 000+ in line with OWASP recommendation. 10. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Low KDF iterations. Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. Among other. Argon2 (t=10, m=512MB, p=4) - 486. Click the Change KDF button and confirm with your master password. Thus; 50 + log2 (5000) = 62. Unless there is a threat model under which this could actually be used to break any part of the security. Okay. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. log file is updated only after a successful login. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. On a sidenote, the Bitwarden 2023. Palant said this flaw meant that the security level of Bitwarden is identical to what LastPass had. ago. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Theoretically, key rotation is the most dangerous because the vault has to be entirely re-encrypted, unlike the other operations of which the encryption key has to be re. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Also make sure this is done automatically through client/website for existing users (after they are logged in) to enforce that minimum. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). pub const CLIENT_KDF_ITER_DEFAULT: i32 = 5_000; Was wondering if there was a reason its set so low by default, and if it shouldn't be 100,000 like Bitwarden now uses for their default? Or possibly a configurable option like how PASSWORD_ITERATIONS is. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Ask the Community. I didn’t realize it was available as I had been looking in the extension and desktop apps, not realizing a different option existed in the web vault. I increased KDF from 100k to 600k and then did another big jump. Kyle managed to get the iOS build working now,. More is better, up to a certain point. 10. With the warning of ### WARNING. So, I changed it by 100000 as suggested in the “Encryption key settings” warning. OK, so now your Master Password works again?. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. . The user probably wouldn’t even notice. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. By default, the iteration count in the client is 5,000 but supports up to 2,000,000. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) =. The point of argon2 is to make low entropy master passwords hard to crack. Therefore, a rogue server could send a reply for. 1 was failing on the desktop. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. So I go to log in and it says my password is incorrect. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Bitwarden Community Forums Master pass stopped working after increasing KDF. Therefore, a rogue server could send a reply for. The recent LastPass breach has put a lot of focus on the number of PBKDF2 hash iterations used to derive the decryption key for the password vault. Mobile: The C implementation of argon2 was held up due to troubles building for iOS. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Or it could just be a low end phone and then you should make your password as strong as possible. json file (storing the copy in any. The user probably wouldn’t even notice. Then edit Line 481 of the HTML file — change the third argument. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. I think the . Expand to provide an encryption and mac key parts. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations va. No performance issue once the vault is finally unlocked. 5s to 3s delay after setting Memory. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. If that was so important then it should pop up a warning dialog box when you are making a change. Do keep in mind Bitwarden still needs to do QA on the changes and they have a 5 week release cycle. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. With the warning of ### WARNING. Unless there is a threat model under which this could actually be used to break any part of the security. 0 update changes the number of default KDF iterations to 600,000, you can change it manually too. The try it again with Argon2id, using the minimum settings for memory (16 MiB) and iterations (2. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. All of this assumes that your KDF iterations setting is set to the default 100,000. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. The user probably wouldn’t even notice. ddejohn: but on logging in again in Chrome. Therefore, a rogue server could send a reply for. The user probably wouldn’t even notice. ## Code changes We just inject the stateservice into the export service to get the KDF type and iterations, and write them into the exported json/use them to encrypt. Unless there is a threat model under which this could actually be used to break any part of the security. Regarding brute force difficulty, kdf_iterations is currently hard-coded to 100,000, which is the same default for a Bitwarden account and Bitwarden Send. 2 Likes. OK, so now your Master Password works again?. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. With the warning of ### WARNING. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. (The key itself is encrypted with a second key, and that key is password-based. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. ddejohn: but on logging in again in Chrome. Next, go to this page, and use your browser to save the HTML file (source code) of that page.