IKEv2

IKEv2 (Internet Key Exchange version 2) is a protocol used to set up secure, authenticated communications over an IP network. Developed by the Internet Engineering Task Force (IETF), it was introduced in December 2005 as an improvement over its predecessor, IKEv1. This protocol is commonly employed to establish Virtual Private Network (VPN) connections, providing enhanced security and performance.

IKEv2 is part of the IPsec (Internet Protocol Security) suite, which ensures secure communication across potentially insecure networks like the Internet. The main purpose of IKEv2 is to handle the authentication and negotiation of security associations and keys in a secure and efficient manner. As an upgrade to IKEv1, IKEv2 offers greater robustness, fewer vulnerabilities, and better resistance to Denial-of-Service (DoS) attacks. Developed by the IETF, the protocol was formally documented in RFC 4306 in December 2005 and later updated by RFC 5996 and others. One of the standout features of IKEv2 is its support for Mobility and Multi-homing Protocol (MOBIKE), which allows seamless session continuity for mobile users who change IP addresses, such as when switching from a mobile data connection to Wi-Fi. Additionally, IKEv2 incorporates a simplified message exchange, reducing the number of steps required to set up a secure connection compared to IKEv1. This not only speeds up the connection process but also minimizes the likelihood of errors or vulnerabilities during setup. Its wide adoption and ongoing updates make IKEv2 a reliable choice for modern secure communications.