Using Bloom Filters for Authenticated Yes/No Answers in the DNS

Document Type Expired Internet-Draft (individual)
Last updated 2001-12-17
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Some aspects of DNSSEC, such as NXDOMAIN error messages, require an authenticated answer. Producing this answer requires complex mechanisms, online storage of the zone's secret key, expensive online computations, or massive zone files. As an alternative, we propose storage of authenticated pointers to Bloom filters. This scheme provides large reductions in the size of, and computational expense to produce, partially-signed zone files.


Steven Bellovin (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)