Patent ID: 11889312
Assignee: SATELLES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 36:
37. A system for validation of a source of a message, the system comprising:
a memory storing a trusted hash chain tag of a hash chain;
a radio frequency receiver configured to receive a first message from a low earth orbit satellite, the first message being a burst and including a first hash chain tag of the hash chain, the first hash chain tag being an earlier tag than the trusted hash chain tag in the hash chain, and first position, navigation, timing (PNT) data configured for measurement of time or geolocation of the radio frequency receiver; and
a processor configured to hash in sequence from the first hash chain tag received in the first message and compare a result of the hash in the sequence to the trusted hash chain tag.