this post was submitted on 17 Jun 2023
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Veracrypt

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VeraCrypt: Free Disk Encryption Software, a fork of TrueCrypt.

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Does VC support ChaCha20-Poly1305? (self.veracrypt)
submitted 1 year ago by sysadmin to c/veracrypt
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For Full Disk Encryption, no. This is due to 3 reasons, 1 being ChaCha20 is a stream cipher, 2 being the Poly1305 variant is authenticated which is not suitable for Full Disk Encryption (due to overhead and sector sizes on drives), and 3 the standard variant can only safely encrypt 256GB of data if I recall correctly. AES-256 in XTS mode is more suitable for the purpose Veracrypt serves which is Block Level Encryption or Full Disk Encryption. ChaCha20 in general is better for individual File Encryption or File Based Encryption, for example CryFS, and Picocrypt.

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[โ€“] sysadmin 1 points 1 year ago

There is a Ram encryption option in VeraCrypt which is using ChaCha20. (I have this enabled).

[โ€“] sysadmin 1 points 1 year ago

For Full Disk Encryption, no. This is due to 3 reasons, 1 being ChaCha20 is a stream cipher, 2 being the Poly1305 variant is authenticated which is not suitable for Full Disk Encryption (due to overhead and sector sizes on drives), and 3 the standard variant can only safely encrypt 256GB of data if I recall correctly. AES-256 in XTS mode is more suitable for the purpose Veracrypt serves which is Block Level Encryption or Full Disk Encryption. ChaCha20 in general is better for individual File Encryption or File Based Encryption, for example CryFS, and Picocrypt.