US Patent 10110611 Multi-level security enforcement utilizing data typing

A computer-implemented method, a computer system, and a computer program product are provided for enforcing multi-level security (MLS) on a message transmitted over a network that may be insecure. The method includes the processor obtaining a request from a source to send a message to a target, where the request includes the message and a context indicating a requested security level for the message. The processor encrypts the message based on ascertaining the message received in the request is a plaintext. The processor authenticates the encrypted message based on ascertaining the encrypted message is a ciphertext, where the target is enabled to trace the authenticated ciphertext back to the source. The processor transmits the authenticated encrypted message to the target across the network.