Encryption Key Auto Exchange Settings And Encryption Key Manual Settings - Ricoh Aficio MP W5100 Operating Instructions Manual

ESP Protocol
The ESP protocol provides both packet encryption and authentication. This protocol does not provide
header authentication.
• For successful encryption, both the sender and receiver must specify the same encryption
algorithm and encryption key. If you use the encryption key auto exchange method, the
encryption algorithm and encryption key are specified automatically.
• For successful authentication, the sender and receiver must specify the same authentication
algorithm and authentication key. If you use the encryption key auto exchange method, the
authentication algorithm and authentication key are specified automatically.
AH Protocol
The AH protocol provides header authentication only. This protocol does not provide packet
encryption.
• For successful authentication, the sender and receiver must specify the same authentication
algorithm and authentication key. If you use the encryption key auto exchange method, the
authentication algorithm and authentication key are specified automatically.
AH Protocol + ESP Protocol
When combined, the ESP and AH protocols provide packet encryption and both packet and header
authentication.
• For successful encryption, both the sender and receiver must specify the same encryption
algorithm and encryption key. If you use the encryption key auto exchange method, the
encryption algorithm and encryption key are specified automatically.
• For successful authentication, the sender and receiver must specify the same authentication
algorithm and authentication key. If you use the encryption key auto exchange method, the
authentication algorithm and authentication key are specified automatically.
• Some operating systems use the term "Compliance" in place of "Authentication".

Encryption Key Auto Exchange Settings and Encryption Key Manual Settings

This machine provides two key setting methods: manual and auto exchange. Using either of these methods,
agreements such as the IPsec algorithm and key must be specified for both sender and receiver. Such
agreements form what is known as an SA (Security Association). IPsec communication is possible only if
the receiver's and sender's SA settings are identical.
If you use the auto exchange method to specify the encryption key, the SA settings are auto configured on
both parties' machines. However, before setting the IPsec SA, the ISAKMPSA (Phase 1) settings are auto
configured. After this, the IPsec SA (Phase 2) settings, which allow actual IPsec transmission, are auto
configured.
Transmission Using IPsec
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