RFC 3414 (rfc3414) - Page 3 of 88


User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)



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RFC 3414                     USM for SNMPv3                December 2002


   7.3.1.    Processing an Outgoing Message........................ 61
   7.3.2.    Processing an Incoming Message........................ 61
   8.        CBC-DES Symmetric Encryption Protocol................. 63
   8.1.      Mechanisms............................................ 63
   8.1.1.    Symmetric Encryption Protocol......................... 63
   8.1.1.1.  DES key and Initialization Vector..................... 64
   8.1.1.2.  Data Encryption....................................... 65
   8.1.1.3.  Data Decryption....................................... 65
   8.2.      Elements of the DES Privacy Protocol.................. 65
   8.2.1.    Users................................................. 65
   8.2.2.    msgAuthoritativeEngineID.............................. 66
   8.2.3.    SNMP Messages Using this Privacy Protocol............. 66
   8.2.4.    Services provided by the DES Privacy Module........... 66
   8.2.4.1.  Services for Encrypting Outgoing Data................. 66
   8.2.4.2.  Services for Decrypting Incoming Data................. 67
   8.3.      Elements of Procedure................................. 68
   8.3.1.    Processing an Outgoing Message........................ 68
   8.3.2.    Processing an Incoming Message........................ 69
   9.        Intellectual Property................................. 69
   10.       Acknowledgements...................................... 70
   11.       Security Considerations............................... 71
   11.1.     Recommended Practices................................. 71
   11.2.     Defining Users........................................ 73
   11.3.     Conformance........................................... 74
   11.4.     Use of Reports........................................ 75
   11.5.     Access to the SNMP-USER-BASED-SM-MIB.................. 75
   12.       References............................................ 75
   A.1.      SNMP engine Installation Parameters................... 78
   A.2.      Password to Key Algorithm............................. 80
   A.2.1.    Password to Key Sample Code for MD5................... 81
   A.2.2.    Password to Key Sample Code for SHA................... 82
   A.3.      Password to Key Sample Results........................ 83
   A.3.1.    Password to Key Sample Results using MD5.............. 83
   A.3.2.    Password to Key Sample Results using SHA.............. 83
   A.4.      Sample encoding of msgSecurityParameters.............. 83
   A.5.      Sample keyChange Results.............................. 84
   A.5.1.    Sample keyChange Results using MD5.................... 84
   A.5.2.    Sample keyChange Results using SHA.................... 85
   B.        Change Log............................................ 86
             Editors' Addresses.................................... 87
             Full Copyright Statement.............................. 88










Blumenthal & Wijnen         Standards Track


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