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Redactable vs. Sanitizable Signatures
| Content Provider | Semantic Scholar |
|---|---|
| Author | Samelin, Kai Pöhls, Henrich Christopher Posegga, Joachim Meer, Hermann De |
| Copyright Year | 2013 |
| Abstract | Malleable signature schemes allow altering signed data in a controlled way while keeping the signature verifiable trusting the signer’s key. Several constructions exists. They can be grouped in two different categories: (1) redactable signatures (RSS) and (2) sanitizable signatures (SSS). RSSs allow for removing blocks of a signed document, while SSSs offer the possibility to change all admissible blocks to arbitrary strings. This paper shows that SSSs with a strenghted security definition can be transformed into RSSs with a weakened privacy definition. A transformation from a RSS into a SSS is not possible, even if we assume accountability for RSS. In particular, no unforgeable RSS can be transformed into a SSS. This work provides the first rigorous proof that RSSs and SSSs are two different concepts. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.fim.uni-passau.de/fileadmin/files/forschung/mip-berichte/MIP-1208_neu.pdf |
| Alternate Webpage(s) | http://www.fim.uni-passau.de/fileadmin/files/forschung/mip-berichte/MIP-1208_neu.pdf |
| Alternate Webpage(s) | http://www.fim.uni-passau.de/fileadmin/files/lehrstuhl/meer/publications/pdf/Samelin2012c.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |