Crypt Alternatives

• Big crypt/Crypt 16 (with bigger salt)

• MD5 checksums

• My password: $1$hbBeFOKZ$aFNCuMJYVHKhilScsqy1e0

• Shadow passwords vs Yellow Pages

• Problems with non standard crypt algorithms and YP

• PAM

• http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam-6.html

• /etc/pam.d/passwd:

• #%PAM-1.0

• #

• # These lines allow a md5 systems to support passwords of at least 14

• # bytes with extra credit of 2 for digits and 2 for others the new

• # password must have at least three bytes that are not present in the

• # old password

• #

• password required pam_cracklib.so difok=3 minlen=15 dcredit=2 ocredit=2

• password required pam_pwdb.so use_authtok nullok md5