PSA: Yes, 64-byte key file is OK
Posted by Michał ‘mina86’ Nazarewicz on 4th of April 2017
In an earlier entry I’ve changed generated key file used for disk encryption from 4096 to meagre 64 bytes. I gave no mention of that adjustment considering it unimportant but have since been enquired about security of such a short password.
Rest assured, a 64-byte key file is sufficient for any symmetric encryption (disk encryption being one example) and anything more does not improve security.