Private eLoran Signal Timing via Pseudo-Random Codes

The patent applies dynamics by transitioning from fixed transmission times to pseudo-random transmission times. The transmitter uses a pseudo-random code generator to determine transmission times dynamically, making the signal unpredictable to unauthorized users while remaining synchronized for authorized receivers that possess the matching key. This resolves the contradiction by maintaining timing precision through synchronization protocols while enhancing security through dynamic, unpredictable transmission patterns.

The patent changes the transmission time parameter from fixed to pseudo-random values. By modifying this critical parameter using cryptographic keys and pseudo-random code generators, the system maintains measurable precision for authorized users while becoming unpredictable to unauthorized users, thereby simultaneously achieving timing precision and resistance to jamming/s spoofing.

The patent uses copying by distributing identical pseudo-random code generators and cryptographic keys to both transmitters and authorized receivers. This allows receivers to generate local copies of the expected transmission times, enabling them to synchronize and validate signals without requiring complex decryption hardware. The copying approach maintains reliability through pseudo-random timing while managing complexity through standardized, replicated components.

The patent introduces cryptographic keys and pseudo-random code generators as intermediaries between the transmitter and receiver. These intermediaries enable the system to achieve pseudo-random transmission timing without requiring direct complex coordination between transmitters and receivers. The intermediary layer handles the complexity of key management and code generation, simplifying the overall system architecture while maintaining security and reliability.