SNMPv3 controls access and security using the concepts of users, groups, security models, and security levels.
Users are created by specifying a user name. Depending on whether the user will be using authentication and/or privacy, you would also specify an authentication protocol ( RSA Data Security, Inc. MD5 (Message-Digest algorithm 5) Message-Digest Algorithm or SHA) with password or key, and/or privacy (DES, 3DES, AES) password or key.
Before using the AES, 3DES users, you must install the SSH module and restart the snmpMaster process. Refer to Installing a Modular Software Package for information on installing the SSH module.