Patent ID: 11863535
Assignee: U-BLOX AG
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A system for secure communications over a network, the system comprising:
a third device comprising:
a receiver configured to receive a data packet from a first device, the data packet comprising an encrypted data part and a metadata part, the metadata part comprising a cleartext part and removable metadata, the removable metadata comprising: a network access code that is authenticatable by means of a network access key, and an indication of an expiration time;
a validator coupled to the receiver and comprising:
a memory storing the network access key and instructions, and
a processor configured to execute the instructions to cause the validator to validate the received data packet by:
authenticating the network access code using the network access key;
validating whether the expiration time has passed by obtaining a current time via the first device and comparing the expiration time with the current time of the first device;
discarding the data packet if the expiration time has passed, or authentication of the network access code fails, or both the expiration time has passed and the authentication of the network access code fails; and
removing the removable metadata from the data packet to alter the data packet; and

a transmitter coupled to the validator and configured to receive the altered data packet and transmit the altered data packet to a second device.