IPSec/Quick Mode Security Association (IPSec/QM SA) A secure communication channel for IPSec, including encryption and authentication methods, encryption keys and lifetimes.

ISAKMP HP supports the Internet Security Association and Key Management Protocol (ISAKMP) in conjunction with the Oakley Key Exchange Protocol to establish an authenticated key exchange. ISAKMP defines procedures and packet formats to establish a security association between two negotiating entities.

ISAKMP/Main Mode Security Association (ISAKMP/MM SA) The ISAKMP/MM SA is a secure communication channel that IKE uses to negotiate IPSec/Quick Mode SAs.

ISAKMP/MM SA See ISAKMP/Main Mode Security Association.

MAC A message authentication code (MAC) is an authentication tag, also called a checksum, derived by application of an authentication scheme, together with a secret key, to a message. MACs are computed and verified with the same key so they can only be verified by the intended receiver, unlike digital signatures.

Hash function-based MACs (HMACS) use a key or keys in conjunction with a hash function to produce a checksum that is appended to the message. An example is the keyed-MD5 method of message authentication.

MACs can also be derived from block ciphers. The DES-CBC MAC is a widely used US and international standard. The basic

Glossary

Perfect Forward Secrecy (PFS)

idea is to encrypt the message blocks using DES CBC and output the final black in the ciphertext as the checksum.

Main Mode (MM) The first phase (Phase One) of IKE negotiations, which establishes an ISAKMP/MM Security Association (SA). IKE authenticates the identity of the peer system and uses a Diffie-Hellman exchange to establish dynamic keying material. The ISAKMP/MM SA is a secure communication channel that IKE uses to negotiate IPSec/Quick Mode SAs.

Manual Keys Manually configured cryptographic keys for IPSec. An alternative to using the Internet Key Exchange (IKE) protocol to generate cryptographic keys and other information for IPSec Security Associations (SAs).

MD5 (Message Digest-5). Authentication algorithm developed by RSA. MD5 generates

a128-bit message digest using a 128-bit key. IPSec truncates the message digest to 96 bits.

MMSee Main Mode.

Oakley Oakley is a key exchange protocol which works within the ISAKMP framework to generate authenticated keying material for use with other security services.

Policy A generic term referring to packet filter information and actions. The packet filter is used to select a policy for a packet and the actions are applied to the packets using the policy.

Perfect Forward Secrecy (PFS) With Perfect Forward Secrecy the exposure of one key permits access only to data protected by that key. HP-UX IPSec supports PFS for keys and identities (the IKE daemon can be

Glossary

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