FIELD: physics.
SUBSTANCE: invention relates to systems and methods for protecting confidentiality of online communication. Client machine participates in private information retrieval (PIR) exchanges with a name server. In response to receiving an encrypted request from a client, where the request is formulated in accordance with a domain name, the name server may retrieve an entry (e.g., an IP address) from the domain name database without decrypting the corresponding request. Some embodiments achieve such information extraction by using homomorphic encryption.
EFFECT: enabling confidentiality-preserving DNS exchanges.
20 cl, 17 dwg, 1 tbl
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