Practical Network Scanning

Internet Protocol Security

Internet Protocol Security (IPsec) is a widely deployed open standard,multi-vendor supported framework design based on cryptography to achieve security and data protection for IPv4 and IPv6. IPsec does support symmetric and asymmetric cryptography to secure communications. The asymmetric cryptography always requires more CPU processing power and higher performance. This is because the implementation uses asymmetric cryptography to share a shared secret and it then performs symmetric encryption. 

The main components of IPSec are mentioned below:

• Authentication Header (AH)
• Encapsulating Security Payload (ESP)
• Internet Key Exchange Protocols (IKE)

AH only provides message authentication. In other words, AH only lets ...