IPSEC PROTOCOLS

                                                               IPSEC PROTOCOL

• IPsec can protect data flows between a pair of hosts, between a pair of security gateways or between a security gateways and a host. 

• To support the activities, a number of different components make up the total package known as IPsec.

• Transport mode provides protection primarily for upper-layer protocols. Tunnel mode provides protection to the entire IP packet. 

• A replay attack is one is which an attacker obtains a copy of an authenticated packer and later transmits it to the intended destination

• The ICV is a message authentication code or a truncated version of a code produced by a MAC algorithm.

Keywords:

AH    -     Authentication Header

ESP    -    Encapsulating Security Payload

ICV    -    Integrity Check Value

MAC    -    Message Authentication Code

IV        -    Initialization Vector