Today I was looking the best hashing algorithm and I found that SHA-3 seems the best one. I try to edit the file "/etc/pam.d/common-password" (in Debian) for use SHA-3 instead of sha512, i look into the pam_unix documentation but there are not any option for set up SHA-3 (only sha512, blowfish md5, etc). My question is, how I can use sha-3 (keccak) algorithm for have a better password security? Someone have more information about it? Regards.