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SBSM BOF Session-Based Security Model for SNMPv3

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Presentation on theme: "SBSM BOF Session-Based Security Model for SNMPv3"— Presentation transcript:

1 SBSM BOF Session-Based Security Model for SNMPv3
Wes Hardaker David T. Perkins November, 2004 (draft-hardaker-snmp-sbsm-03.txt)

2 SBSM Protocol Proposal
Current draft: draft-hardaker-snmp-sbsm-03.txt Creates a “session” between two points 3 phases to the session: Initialization (Security setup, authentication) Running Closing Initialization PDUs sent are GET/REPORT PDUs, but the application never sees them. Similar to EngineID discovery today

3 Session Message Flow ... Initialization Running Closing
SNMP App SBSM Initiator SBSM Responder SNMP App SNMP PDU Initialization Init 1 Init 2 Init 1 Running Running SNMP PDU Traffic protected by SBSM SNMP PDU ... Closing Close Close Note: Other SNMPv3 components (MP, etc) not shown but exist where expected Init 1

4 SBSM Disadvantages Based on SNMPv3 security model parameters

5 SBSM Advantages Reuses existing transports
(UDP, TCP, IPX, AAL5, … +future) SNMPv3 architecture compliant SNMPv3 application compliant Reuses Existing Authentication Systems Local accounts, SSH, X.509, … No “must have” system to make it work Extensible Authentication Definitions New authentication types = 1-2 pages

6 SBSM Advantages Supports compression
Supports identity disclosure protection Supports true replay protection Reuses SNMPv3 where possible Same message integrity (MD5, SHA-1) Same encryption (DES, AES) Flexible enough to negotiate needs Rigid enough not to make negotiation a complex burden

7 SBSM Advantages Based on a mathematically proven cryptographic exchange protocol SIGMA (also used in other protocols)

8 SBSM Implementation Report
Implementation completed for: Local account authentication Key negotiation Authentication Algorithm Negotiation Encryption Algorithm Negotiation Total time to implement in Net-SNMP:

9 SBSM Implementation Report
Implementation completed for: Local account authentication Key negotiation Authentication Algorithm Negotiation Encryption Algorithm Negotiation Total time to implement in Net-SNMP: 19.5 Hours

10 Questions? Wes Hardaker David T. Perkins November, 2004
(draft-hardaker-snmp-sbsm-03.txt)

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