Documents by U. Blumenthal
1998, RFC2264: User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)
1998, RFC2274: User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)
1999, RFC2574: User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)
2002, RFC3414: User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)