Subversion-Resistant Commitment Schemes: Definitions and Constructions
| Autor: | Karim Baghery |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
050101 languages & linguistics
Cryptographic primitive GeneralLiterature_INTRODUCTORYANDSURVEY Computer science 05 social sciences 02 engineering and technology Computer security computer.software_genre Variety (cybernetics) 0202 electrical engineering electronic engineering information engineering Research studies Key (cryptography) 020201 artificial intelligence & image processing 0501 psychology and cognitive sciences Commitment scheme Subversion computer |
| Zdroj: | Security and Trust Management ISBN: 9783030598167 STM |
| Popis: | Recently, various news is reported about the subversion of trusted setup phase in mass-surveillance activities; strictly speaking about commitment schemes, recently it was discovered that the SwissPost-Scytl mix-net uses a trapdoor commitment scheme, that allows undetectably altering the votes and breaking users’ privacy, given the trapdoor [Hae19, LPT19]. Motivated by such news and recent studies on subversion-resistance of various cryptographic primitives, this research studies the security of commitment schemes in the presence of a maliciously chosen commitment key. To attain a clear understanding of achievable security, we define a variety of current definitions called subversion hiding, subversion equivocality, and subversion binding. Then we provide both negative and positive results on constructing subversion-resistant commitment schemes, by showing that some combinations of notions are not compatible while presenting subversion-resistant constructions that can achieve other combinations. |
| Databáze: | OpenAIRE |
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