1 (crypt_bsdmd5.so): One-way password hashing module for use with crypt(3C) that uses the MD5 message hash algorithm. The output is compatible with md5crypt on BSD and Linux systems. Password Limit: 255 chars 2a (crypt_bsdbf.so): One-way password hashing module for use with crypt(3C) that uses the Blowfish cryptographic algorithm. Password Limit: 255 chars md5 (crypt_sunmd5.so): One-way password hashing module for use with crypt(3C) that uses the MD5 message hash algorithm. This module is designed to make it difficult to crack passwords that use brute force attacks based on high speed MD5 implementations that use code inlining, unrolled loops, and table lookup. Password Limit: 255 chars