{"id":148201,"date":"2005-05-01T00:00:00","date_gmt":"2005-05-01T00:00:00","guid":{"rendered":"https:\/\/newed.any0.dpdns.org\/en-us\/research\/msr-research-item\/generating-unforgeable-evidence-for-secure-communications\/"},"modified":"2018-10-16T21:16:45","modified_gmt":"2018-10-17T04:16:45","slug":"generating-unforgeable-evidence-for-secure-communications","status":"publish","type":"msr-research-item","link":"https:\/\/newed.any0.dpdns.org\/en-us\/research\/publication\/generating-unforgeable-evidence-for-secure-communications\/","title":{"rendered":"Generating unforgeable evidence for secure communications"},"content":{"rendered":"<div class=\"asset-content\">\n<p>The Internet is increasingly being used for serious transactions involving money and goods. However, there hardly exists any means for users of Internet transactions to obtain third-party verifiable evidence of the transactions in which they participate. As a solution to this problem, we propose the use of a semi-trusted third party, called a digital witness, that can provide unforgeable transaction evidence without ever seeing the transaction contents. The witness is attached to secure communication sessions in an unintrusive manner: it requires no changes to existing servers or protocols. The key idea in enabling such a witness service is a novel algorithm that splits the computation of a message authentication code (MAC) between the client and the witness. We have implemented a prototype witness, tested it with real web sites and measured its performance. The experimental results show that the overhead of a witness is comparable to that of a web proxy. Therefore, the witness design can be implemented reasonably efficiently in practice.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Internet is increasingly being used for serious transactions involving money and goods. However, there hardly exists any means for users of Internet transactions to obtain third-party verifiable evidence of the transactions in which they participate. As a solution to this problem, we propose the use of a semi-trusted third party, called a digital witness, [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"Hewlett-Packard Laboratories","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"","msr_number":"HPL-2005-71","msr_organization":"","msr_pages_string":"","msr_page_range_start":"","msr_page_range_end":"","msr_series":"","msr_volume":"","msr_copyright":"","msr_conference_name":"","msr_doi":"","msr_arxiv_id":"","msr_s2_paper_id":"","msr_mag_id":"","msr_pubmed_id":"","msr_other_authors":"Minwen Ji, Marcos Aguilera, Mark 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