On 09/24/2012 11:55 AM, Dmitry Kasatkin wrote: > Both dm-verity and dm-crypt provide block level integrity protection. This is not correct. dm-crypt is transparent block encryption target, where always size of plaintext == size of ciphertext. So it can provide confidentiality but it CANNOT provide integrity protection. We need extra space to store auth tag which dmcrypt cannot provide currently. > dm-integrity provides a lighter weight read-write block level integrity > protection for file systems not requiring full disk encryption, but > which do require writability. Obvious question: can be dm-verity extended to provide read-write integrity? I would prefer to use standard mode like GCM to provide both encryption and integrity protection than inventing something new. Milan -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
