{"id":732,"date":"2015-08-17T13:05:09","date_gmt":"2015-08-17T13:05:09","guid":{"rendered":"https:\/\/prismacloud.eu\/?p=732"},"modified":"2018-09-10T10:37:36","modified_gmt":"2018-09-10T10:37:36","slug":"stronger-security-definition-for-sanitizable-signatures","status":"publish","type":"post","link":"https:\/\/prismacloud.eu\/stronger-security-definition-for-sanitizable-signatures\/","title":{"rendered":"Stronger Security for Sanitizable Signatures"},"content":{"rendered":"<p><strong>Authors<\/strong><\/p>\n<p>Stephan Krenn (AIT), Kai Samelin (IBM Research -- Zurich and Technical University of Darmstadt), and Dieter Sommer (IBM Research -- Zurich)<\/p>\n<p><strong>Abstract<\/strong><\/p>\n<p>Sanitizable signatures schemes ($\\SSS$) allow to alter admissible blocks of a signed message by a designated party named the sanitizer. This primitive can be used to remove or alter sensitive data from already signed messages without involvement of the original signer.<br \/>\nCurrent state-of-the-art security definitions of $\\SSS$s only define a \"weak\" form of security. Namely, the unforgeability, accountability and transparency definitions are not strong enough to be meaningful in certain use-cases. We identify some of these use-cases, close this gap by introducing stronger definitions and show how to alter an existing construction to meet our desired security level. Moreover, we clarify a small yet important detail in the state-of-the-art privacy definition. Our work allows to deploy this primitive in more and different scenarios.<\/p>\n<p><strong>Venue<\/strong><\/p>\n<p>10th DPM International Workshop on Data Privacy Management, DPM 2015 (<a href=\"http:\/\/deic.uab.cat\/conferences\/dpm\/dpm2015\/\">http:\/\/deic.uab.cat\/conferences\/dpm\/dpm2015\/<\/a>)<\/p>\n<p><strong>Place and Date<\/strong><\/p>\n<p>Vienna, Austria, September 21st \u2013 22nd, 2015<\/p>\n<p><strong>Publication Reference<\/strong><\/p>\n<p>Stephan Krenn, Kai Samelin, and Dieter Sommer, \"Stronger Security Definition for Sanitizable Signatures\", Data Privacy Management - DPM 2015, Vienna, Austria, September 21\u201322, 2015.<\/p>\n<p><strong>Bibtex<\/strong><\/p>\n<p>@inproceedings{cklmnp15, Author\u00a0\u00a0\u00a0 = {Stephan Krenn and Kai Samelin and Dieter Sommer}, Title\u00a0\u00a0\u00a0\u00a0 = {{Stronger Security Definition for Sanitizable Signatures}}, Booktitle = {Data Privacy Management -- {DPM} 2015, Vienna, Austria}, Year\u00a0\u00a0\u00a0 \u00a0\u00a0= {2015}, Publisher\u00a0= {Springer} }<\/p>\n<p>[<a href=\"https:\/\/prismacloud.eu\/wp-content\/uploads\/2018\/09\/Stronger-Security-for-Sanitizable-Signatures.pdf\">Download<\/a>]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Stephan Krenn, Kai Samelin, and Dieter Sommer, \"Stronger Security Definition for Sanitizable Signatures\", Data Privacy Management - DPM 2015, Vienna, Austria, September 21\u201322, 2015.<\/p>\n","protected":false},"author":6,"featured_media":746,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/posts\/732"}],"collection":[{"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/comments?post=732"}],"version-history":[{"count":4,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/posts\/732\/revisions"}],"predecessor-version":[{"id":3168,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/posts\/732\/revisions\/3168"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/media\/746"}],"wp:attachment":[{"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/media?parent=732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/categories?post=732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prismacloud.eu\/wp-json\/wp\/v2\/tags?post=732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}