Patent ID: 11882101
Assignee: INFINEON TECHNOLOGIES AG
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 19:
20. A communication device comprising
a communication interface and
a processor configured to
receive a blinded public key from another communication device;
Generate a shared secret;
Encrypt the shared secret using the blinded public key;
Transmit the encrypted shared secret to the other communication device;
Generate a session key from the shared secret;
Receive encrypted information from the other communication device, decrypt the information using the session key and derive a blinding value sr for a first private key component of the other communication device and a blinding value er for a second private key component of the other communication device from the information, wherein the blinding value sr for the first private key component is a value to be combined with the first private key component to mask the first private key component and wherein the blinding value er for the second private key component is a value to be combined with the second private key component to mask the second private key component; and
Verify that the received blinded public key is a public key of the other communication device using the blinding value sr for the first private key component and the blinding value er for the second private key component.