The first, type 7, uses a Cisco proprietary weak encryption algorithm. Cisco Password EncryptionĬisco uses two encryption methods to secure IOS passwords. One server may have theĬonfiguration files for every Cisco device on the network. (Trivial File Transfer Protocol) servers. Network administrators often store IOS configuration files on T FTP TopBits-Cisco (config)#service password-encryption ‘service password-encryption’ is enabled using the following command: Once there is access to the Cisco configuration file, the passwords can be decrypted fairly easily. If ‘service password-encryption’ is configured on the Cisco device, most of the passwords are encrypted with a weak encryption algorithm (Type 7) that is easy to decrypt. If ‘service password-encryption’ is not configured on the Cisco device, simply read the plain text passwords from the configuration file.
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