2009/10/13 by Yanbin Lu, Gene Tsudik, Lu, Yanbin +1 · 1 citation
Computer Science · Engineering · #Caching and Content Delivery #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #IPv6, Mobility, Handover, Networks, Security #Internet Traffic Analysis and Secure E-voting
paper · pdf · doi:10.48550/arxiv.0910.2472
openalex publication_date 2009/10/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Privacy leaks are an unfortunate and an integral part of the current Internet domain name resolution. Each DNS query generated by a user reveals -- to one or more DNS servers -- the origin and target of that query. Over time, a user's browsing behavior might be exposed to entities with little or no trust. Current DNS privacy leaks stem from fundamental DNS features and are not easily fixable by simple patches. Moreover, privacy issues have been overlooked by DNS security efforts (i.e. DNSSEC) and are thus likely to propagate into future versions of DNS. In order to mitigate privacy issues in current DNS, this paper proposes a Privacy-Preserving Domain Name System (PPDNS), which maintains privacy during domain name resolution. PPDNS is based on distributed hash tables (DHTs), an alternative naming infrastructure, and computational private information retrieval (cPIR), an advanced cryptographic construct. PPDNS takes advantage of the DHT's index structure to improve name resolution query privacy, while leveraging cPIR to reduce communication overhead for bandwidth-sensitive clients. Our analysis shows that PPDNS is a viable approach for obtaining a higher degree of privacy for name resolution queries. PPDNS also serves as a demonstration of blending advanced systems techniques with their cryptographic counterparts.