Encryption of communications

Encryption of communications hides the message content to unauthorized eavesdropper, ensuring confidentiality.

The Space Data Link Security Protocol is a standard defined how to apply encryption, authenticated encryption and encryption only (not recommended) for the CCSDS communication at the Data Link Layer.

Payload traffic, if related to network communications, can use specific traffic protocols, e.g., QPEP. Range data shall be also encrypted. ^{[1] [2] [3]}