By Jonathan Katz, Philip MacKenzie, Gelareh Taban (auth.), John Ioannidis, Angelos Keromytis, Moti Yung (eds.)
The third overseas convention on utilized Cryptography and community safeguard (ACNS 2005) used to be subsidized and arranged through ICISA (the overseas Commu- cations and knowledge safety Association). It used to be held at Columbia college in ny, united states, June 7–10, 2005. This convention complaints quantity comprises papers provided within the academic/research song. ACNS covers a number of study components which have been gaining significance lately as a result of improvement of the net, instant communique and the elevated worldwide publicity of computing assets. The papers during this quantity are consultant of the cutting-edge in protection and cryptography examine, around the globe. this system Committee of the convention acquired a complete of 158 submissions from worldwide, of which 35 submissions have been chosen for presentation on the a- demic music. as well as this song, the convention additionally hosted a technical/ business/ brief papers song whose displays have been additionally conscientiously chosen from one of the submissions. All submissions have been reviewed through specialists within the appropriate areas.
Read or Download Applied Cryptography and Network Security: Third International Conference, ACNS 2005, New York, NY, USA, June 7-10, 2005. Proceedings PDF
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Additional resources for Applied Cryptography and Network Security: Third International Conference, ACNS 2005, New York, NY, USA, June 7-10, 2005. Proceedings
The cost of sending one message is several magnitudes lower than the cost of solving a puzzle. Hence, Eve’s cost of running online dictionary attacks and her cost of running many-to-many attacks 28 Peng Wang et al. Client (C) Server (S) enter C, π x ∈R Z∗ q X = f1 (x, π) find ticket and cookie abort if ticket is expired find a in the ticket k1 = f3 (C, S, x, Y, π) kp = h(k1 , a) abort if kp = kp k2 = f5 (C, S, x, Y, π) C, X, cookie −−−−−−−−−−−−−−− → Y, kp , cookienew , l ←−−−−−−−−−−−−−−− kq kq = h(k2 , a) compute sk generate ticketnew save cookienew and ticketnew −−−−−−→ abort if the cookie is invalid find a in the cookie lookup client’s verifier v y ∈R Z∗ q Y = f2 (C, S, X, y, v) k1 = f4 (C, S, X, y, v) kp = h(k1 , a ) compute sk generate cookienew k2 = f6 (C, S, X, y, v) kq = h(k2 , a ) abort if kq = kq Fig.
F. Bao. Security Analysis of a Password Authenticated Key Exchange Protocol. In Proc. ISC 2003, LNCS 2851, pp. 208-217, 2000. Cryptanalysis of an Improved C2C-PAKE Scheme 39 2. W. R. H. S. Park. Password-Authenticated Key Exchange between Clients with Diﬀerent Passwords. In Proc. ICICS 2002, LNCS 2513, pp. 134-146, 2002. 3. L. Chen. A Weakness of the Password-Authenticated Key Agreement between Clients with Diﬀerent Passwords Scheme. 24, 2003. 4. J. Kim, S. Kim, J. Kwak, and D. Won. Cryptanalysis and Improvement of Password-Authenticated Key Exchange Scheme between Clients with Diﬀerent Passwords.
Hence, our cookie-ticket pair approach is more secure than the cookie only approach used in Pinkas and Sander’s approach. Further, our scheme requires less server storage than that required in . In their approach, a server keeps a counter for every cookie stored on users’ computers. In our approach, on one hand, if we assume that users’ computers are secure, then the server does not cache cookies, it only stores one global counter. On the other hand, if users’ computers are not assumed to be secure and the “resisting stolen tickets” protocol (explained at the end of section 4) is used, then the number of cookies and the corresponding counters maintained by the server is equal to the number tickets stolen by an attacker, which is still less than their approach.