Cisco Type 7 Encryption3/21/2021
You can specify up to 16 privilege levels, using numbers 0 through 15.
Cisco Type 7 Encryption Password To TheAfter you specify the level and the password, give the password to the users who need to access this level.Typically you enter an encryption type only if you copy and paste into this command a password that has already been encrypted by a Cisco router.You cannot recover a lost password that has been encrypted by any method. Device(config) enable password level 2 4 1FaD0Xyti5Rkls3LoyxzS8. Device(config) enable secret 4 tnhtc92DXBhelxjYk8LWJrPV36S2i4ntXrpb4RFmfqY. WARNING: Command has been added to the configuration but Type 4 passwords have been deprecated. This command was integrated into Cisco IOS Release 12.2(18)SXD. Learn how you can lessen the chance of this occuring with your passwords, and get three steps for locking down your routers. The program will not decrypt passwords set with the enable secret command. The unexpected concern that this program has caused among Cisco customers has led us to suspect that many customers are relying on Cisco password encryption for more security than it was designed to provide. This document explains the security model behind Cisco password encryption, and the security limitations of that encryption. We would expect any amateur cryptographer to be able to create a new program with little effort. The encryption scheme was designed to avoid password theft via simple snooping or sniffing. It was never intended to protect against someone conducting a password-cracking effort on the configuration file. The only instance in which the enable password command might be tested is when the device is running in a boot mode that does not support the enable secret command. As far as anyone at Cisco knows, it is impossible to recover an enable secret based on the contents of a configuration file (other than by obvious dictionary attacks). Indeed, the strength of the encryption used is the only significant difference between the two commands. If the boot image does not support enable secret, note the following caveats. By having a separate enable password, administrators may not remember the password when they are forcing downtime for a software upgrade, which is the only reason to log in to boot mode. If that digit is a 7, the password has been encrypted using the weak algorithm. If the digit is a 5, the password has been hashed using the stronger MD5 algorithm. ![]() If Cisco should decide to introduce such a feature in the future, that feature will definitely impose an additional administrative burden on users who choose to take advantage of it. In order to support certain authentication protocols (notably CHAP), the system needs access to the clear text of user passwords, and therefore must store them using a reversible algorithm. Although it would be easy to modify Cisco IOS to use DES to encrypt passwords, there would be no security advantage in doing so if all Cisco IOS systems used the same DES key. If different keys were used by different systems, an administrative burden would be introduced for all Cisco IOS network administrators, and portability of configuration files between systems would be damaged. Customer demand for stronger reversible password encryption has been small.
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