11.18. SNMP users Table
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## 11.18. SNMP users Table

Wireshark uses this table to verify authentication and to decrypt encrypted SNMPv3 packets.

This table is a user table, as described in Section 11.7, “User Accessible Tables”, with the following fields:

Engine ID
  If given this entry will be used only for packets whose engine id is this. This field takes a hexadecimal string in the form 0102030405.
Username
  This is the userName. When a single user has more than one password for different SNMP-engines the first entry to match both is taken, if you need a catch all engine-id (empty) that entry should be the last one.
Authentication model
  Which auth model to use (either “MD5”, “SHA1”, "SHA2-224", "SHA2-256", "SHA2-384" or "SHA2-512").
Password
  The authentication password. Use \xDD for unprintable characters. A hexadecimal password must be entered as a sequence of \xDD characters. For example, the hex password 010203040506 must be entered as \x01\x02\x03\x04\x05\x06. The \ character must be treated as an unprintable character, i.e., it must be entered as \x5C or \x5c.
Privacy protocol
  Which encryption algorithm to use (either “DES”, “AES”, "AES192" or "AES256").
Privacy password
  The privacy password. Use \xDD for unprintable characters. A hexadecimal password must be entered as a sequence of \xDD characters. For example, the hex password 010203040506 must be entered as \x01\x02\x03\x04\x05\x06. The \ character must be treated as an unprintable character, i.e., it must be entered as \x5C or \x5c.
Key expansion method
  Which method to use to expand the key when the generated key provides too few bytes for the selected encryption method (either based on "draft-reeder-snmpv3-usm-3desede-00" or as implemented in AGENT++).

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