Protocol that nowadays, the use of it is a common swap, Internet key (IKE) is called. The first version of it in 1998, came to the market, and the common, it IKEv1. Because this is the first version of IKE is IPsec as the default was used. Specification IKEv1 section of the hide, it upgrade. For its promotion in 2005, etc. IKEv2 was created. With this update, the protocol more reliable and was in front of the DOS-attacks flexible.