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

Claim 0:
1. A method for secure communications over a network, the method comprising:
receiving, by a third device, 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;
validating, by the third device, the data packet, wherein validating the data packet comprises:
authenticating the network access code using the network access key;
validating whether the expiration time has passed by comparing the expiration time with a current time of the first device, wherein the third device obtains the current time via the first device; and
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;

removing, by the third device, the removable metadata from the data packet after validating the data packet, thereby altering the data packet; and
transmitting, by the third device, the altered data packet to a second device.