Internet Protocol security (IPsec) is a protocol suite enabling secure IP communications by authentication and/or encryption. Internet Key Exchange version 2 (IKEv2) mechanism is recommended to configure dynamically IPsec between IP nodes and the authentication of each peer is usually based on either pre-shared keys, X.509 certificates or Extensible Authentication Protocol (EAP). However, these methods may have drawbacks. On the other hand, Cryptographically Generated Addresses (CGA), IPv6 addresses with specific security properties, are the main component of the mechanism to secure the IPv6 Neighbor Discovery protocol but these security properties are only used in a local scope. An interesting solution could be the use of CGA as alternative security material for IKEv2. In this paper, we analyze advantages and drawbacks of CGA use compared to classical IKEv2 security materials, decide design choices regarding modifications of IKEv2 to integrate CGA, and finally, describe the resulting implementation.