|  |  | One of the better tools available for cracking passwords is L0phtcrack, by L0pht Heavy Industries (www.l0pht.com). launches a dictionary attack against passwords, then attempts a brute force attack against the passwords claims to be able to crack every possible password, although the timing for completion may vary takes 5.5 hours on a Pentium II 300 to brute force attack an 8 character alpha-numeric password Changing passwords every two months without repeating any should be a satisfactory method of protection against password crackers.