Cisco has announced plans for another new type of password which should achieve the original design criteria for type 4. if you input into config mode something that is like secret 5 xxxxxx( which contains the already encrypted type 5 password) then the config will maintain and use the type 5 password. In this video I show you how insecure a Cisco password really is. I hope after watching this video that you stop relying on 'service password-encryption' an.
Enable PasswordDecrypt Cisco Secret 4
Almost all passwords and other authentication strings in Cisco IOS configuration files are encrypted using the weak, reversible scheme used for user passwords. Cisco devices can use a proprietary encryption algorithm to encrypt the password for enable mode and vty lines. This kind of encryption is used when 'service password-encryption' has been enabled on the device and produces Type-7 passwords. Cisco