=?windows-1256?Q?Where_is_D?= =?windows-1256?Q?ES_encrypt?= =?windows-1256?Q?ion_/_decr?= =?windows-1256?Q?yption_key?= =?windows-1256?Q?_used=3F=FE?=

"Marcelo ." <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <[email protected]>
Where, when does exactly the DES encryption / decryption key (64 octets) take part during the encryption /decryption process, because aparently both processes are based only in the initialization vector ?
As you might know, according the RFC3414, from the DES localized key of 16 octets, the first 8 are used as DES encryption / decryption key (this is the only mention of this key in the document); and the final 8 are used as pre - initialization vector (pre IV) . The final initialization vector (8 octets) is obtained from operations made in the pre  IV using the snmpEngineBoots of 4 octets and an arbitrary 4 octets value initialized at boot time.
Please someone can help me explaining when is exactly the DES key used during the encryption and decryption of the messages?

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