Abstract
It is expected that IPv6 will generally be used as Internet Protocol. Following it, encrypted communication using IPsec which is mandatory for IPv6 will increase. On the other hand, it is required to censor the contents of network communication from the point of view of preventing information in a company from being leaked out and network resources from being used for private purposes. So it's a problem that encrypted communication which is impossible to be censored increases. This is a proposal that the method to censor all communication by the server which manages all of Security Associations and Keys being used on IPsec communication for the requirement.
