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 or SHA) with password or key, and/or privacy (DES, 3DES, AES) password or key.