Welcome to the resource topic for 2002/016
Title:
Content Extraction Signatures
Authors: Ron Steinfeld, Laurence Bull, Yuliang Zheng
Abstract:Motivated by emerging needs in online interactions, we define a
new type of digital signature called a Content Extraction Signature' (CES). A CES allows the owner, Bob, of a document signed by Alice, to produce an extracted signature’ on selected
extracted portions of the original document, which can be
verified to originate from Alice by any third party Cathy, while
hiding the unextracted (removed) document portions. The new
signature therefore achieves verifiable content extraction with
minimal multi-party interaction. We specify desirable functional
and security requirements for a CES (including an efficiency
requirement: a CES should be more efficient in either computation
or communication than the simple multiple signature solution). We
propose and analyze four CES constructions which are provably
secure with respect to known cryptographic assumptions and
compare their performance characteristics.
ePrint: https://eprint.iacr.org/2002/016
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