A system for encryption includes a message management module (MMM); a restricted secret server (RSS) including a restricted secret server network interface (RSS-NI) connected to the MMM and including at least one very large key (VLK) module. The system uses Terakey™ an encryption system whose intrinsic security can be demonstrated from first principles, without making assumptions about the computational difficulty of mathematical problems, such as factoring large integers or computing logarithms in finite groups. It employs a key that is much larger than the anticipated volume of message traffic. The large size of the key also reduces the risk of side channel attacks and facilitates realistic security measures to maintain a secure chain of custody for the key.