Patent ID: 9667615
Date: 2017-05-30
CPC Classifications: H04L

Claim:
1. An apparatus comprising: a processing unit configured to receive messages from one or more senders, each message including: first and second holding circuits of a verification memory, the first holding circuit being configured to store a device ID and a corresponding first valid time together with a public key and signature of a previously received message whose public key certificate has failed verification, the second holding circuit being configured to store a device ID and a corresponding second valid time together with a public key of another previously received message whose public key certificate has been successfully verified, wherein the first and second valid times indicate a limit of time for use of the device ID stored in the first and second holding circuits, respectively, wherein the processing unit is configured to, when a message is received at a first time: wherein the processing unit calculates the first valid time and/or the second valid time at a time of storage in the verification memory based on position and/or velocity of the apparatus, wherein each message has a public key certificate of a certificate authority, including a certificate authority ID, the apparatus further comprising third and fourth holding circuits of the verification memory, the third holding circuit being configured to store a certificate authority ID of a previously received message whose public key certificate of the certificate authority has failed verification, the fourth holding circuit being configured to store a certificate authority ID of a previously received message whose public key certificate of the certificate authority has been successfully verified, and wherein the processing unit is further configured to: