Patent ID: 11888828
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for secure domain name system, DNS, queries, the method being performed in a final DNS resolver, the method comprising:
receiving a DNS message with an encrypted DNS query and session key from an intermediate DNS resolver, the received DNS message being without an internet protocol, IP, address to and an query identity, ID of, a DNS client having encrypted the encrypted DNS query and session key;
decrypting the received encrypted DNS query and session key;
obtaining a DNS answer to the decrypted DNS query;
encrypting the DNS answer with the decrypted session key;
sending a DNS message with the encrypted DNS query and answer to the intermediate DNS resolver; and
the DNS message having an OPCODE type indicating an enveloped DNS query.