Security in Key Agreement: Two-Party Certificateless Schemes
| dc.contributor.author | Swanson, Colleen Marie | |
| dc.date.accessioned | 2008-12-22T20:28:16Z | |
| dc.date.available | 2008-12-22T20:28:16Z | |
| dc.date.issued | 2008-12-22T20:28:16Z | |
| dc.date.submitted | 2008 | |
| dc.description.abstract | The main goal of cryptography is to enable secure communication over a public channel; often a secret shared among the communicating parties is used to achieve this. The process by which these parties agree on such a shared secret is called key agreement. In this thesis, we focus on two-party key agreement protocols in the public-key setting and study the various methods used to establish and validate public keys. We pay particular attention to certificateless key agreement schemes and attempt to formalize a relevant notion of security. To that end, we give a possible extension of the existing extended Canetti-Krawzcyk security model applicable to the certificateless setting. We observe that none of the certificateless protocols we have seen in the literature are secure in this model; it is an open question whether such schemes exist. We analyze several published certificateless key agreement protocols, demonstrating the existence of key compromise impersonation attacks and even a man-in-the-middle attack in one case, contrary to the claims of the authors. We also briefly describe weaknesses exhibited by these protocols in the context of our suggested security model. | en |
| dc.identifier.uri | http://hdl.handle.net/10012/4156 | |
| dc.language.iso | en | en |
| dc.pending | false | en |
| dc.publisher | University of Waterloo | en |
| dc.subject | key agreement | en |
| dc.subject | certificateless | en |
| dc.subject | key establishment | en |
| dc.subject | key compromise impersonation | en |
| dc.subject.program | Combinatorics and Optimization | en |
| dc.title | Security in Key Agreement: Two-Party Certificateless Schemes | en |
| dc.type | Master Thesis | en |
| uws-etd.degree | Master of Mathematics | en |
| uws-etd.degree.department | Combinatorics and Optimization | en |
| uws.peerReviewStatus | Unreviewed | en |
| uws.scholarLevel | Graduate | en |
| uws.typeOfResource | Text | en |