thanks ! aha, so when using just "AES", the password length itself determines the number of key bits to encrypt if i use "losetup -e AES -S xxxxxx<-N->xxxxxxx" (meaning N characters for seed) and then password with M characters, will the AES crypt bit size be determined by N, by M or somehow by their combination ? Or which ever is greater / smaller will determine the crypt bit size ? thanks again - rkelly On Sun, 16 Mar 2003, Jari Ruusu wrote: > rkelly@xxxxxxxxx wrote: > > hi what's the difference between using AES and AESnnn (e.g. AES192) > > algorithm ? > > Since you appear to be using Mandrake that includes loop-AES, AES encryption > type is unhashed and password length determines actual number of key bits > used to encrypt. AES128, AES192 and AES256 encryption types hash password > with SHA-256, SHA-384 or SHA-512 and use specified number key bits to > encrypt regardless of password length. Same AES cipher is used in all cases, > only key is set up differently. > > For new setups, use AES128, AES192 or AES256, and specify password seed with > 'mount -o pseed=xxxxxxxxxx' or 'losetup -S xxxxxxxxxx'. > > Regards, > Jari Ruusu <jari.ruusu@xxxxxxxxxx> > > - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/
