What is Authentication Header (AH)?
| Question | |
| What is Authentication Header (AH)? | |
| Solution | |
| AH provides authentication and integrity, which protect against data tampering, using the same algorithms as ESP. AH also provides optional anti-replay protection, which protects against unauthorized retransmission of packets. The authentication header is inserted into the packet between the IP header and any subsequent packet contents. The payload is not touched. Although AH protects the packet's origin, destination, and contents from being tampered with, the identity of the sender and receiver is known. In addition, AH does not protect the data's confidentiality. If data is intercepted and only AH is used, the message contents can be read. ESP protects data confidentiality. For added protection in certain cases, AH and ESP can be used together. In the following table, IP HDR represents the IP header and includes both source and destination IP addresses. | |
| FAQ Details | |
| Category | Network Security |
| Keywords | AH, IPSec, VPN |
| Helpful? | Yes | No Score: 1 |
| Views | 227 |
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