Patent ID: 11930123
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 13:
14. In an environment where a device, which is one of a plurality of entities, can communicate with one or more other entities through the exchange of messages, each message verifiable with a respective certificate, a method comprising:
receiving, by a first entity, a certificate request originating from the device, the certificate request including a caterpillar key;
expanding the caterpillar key, by the first entity, to generate a plurality of cocoon keys;
receiving, by a second entity, the plurality of cocoon keys;
for each cocoon key, generating, by the second entity, both a respective signature key and a respective encryption key according to the same expansion function, wherein each encryption key for encrypting a respective certificate;
generating, by the second entity, one or more encrypted certificate responses, wherein each encrypted certificate response comprises a respective certificate and is encrypted using a respective encryption key;
transmitting the one or more encrypted certificate responses for delivery to the device from which the certificate request originated, wherein the device is capable of decrypting each encrypted certificate response using an associated decryption key to recover the respective certificate.