CIPE (Crypto IP Encapsulation)は、暗号化IPルータを構築するための現在進行中のプロジェクトです。使われるプロトコルは、可能な限り軽量です。これは、UDPパケットの形で予め決められたルータ間で暗号化されたパケットを通過させるために設計されています。これは、IPSecほど柔軟ではありませんが、本来意図された目的（安全でないトランジットネットワークで安全にサブネットを接続する）のためには十分です。
This version runs under Linux 2.6 (as well as earlier versions). It can use the kernel crypto API and its cipher algorithms (with Linux 2.6 or 2.4.23+).
This release corrects the short packets test which was introduced in the previous release but was broken. It also includes the patch to work correctly with netfilter under Linux 2.4.
This release resolves the missing kernel symbol
problem on newer Linux 2.4 kernels and adds a
correct module license tag. It also corrects the
small packet DOS problem.
Autoconf, options to send internal keepalive pings and timeout on them. Runs under Linux 2.1.x, at least with x>=109, and 2.2.x.
Device names have changed: protocol version is now a letter. Channels are allocated and deallocated dynamically. Statistics are logged upon close and then cleared. The log is simply one line from /proc/net/dev. Ciped waits for completion of ip-up before daemonizing. New configuration option for using key exchange timestamps.
