Download Applied Cryptography and Network Security: Third by Jonathan Katz, Philip MacKenzie, Gelareh Taban (auth.), John PDF

By Jonathan Katz, Philip MacKenzie, Gelareh Taban (auth.), John Ioannidis, Angelos Keromytis, Moti Yung (eds.)

The third foreign convention on utilized Cryptography and community defense (ACNS 2005) used to be subsidized and arranged via ICISA (the overseas Commu- cations and data protection Association). It was once held at Columbia collage in big apple, united states, June 7–10, 2005. This convention complaints quantity comprises papers provided within the academic/research song. ACNS covers loads of learn parts which have been gaining significance lately as a result of improvement of the net, instant verbal exchange and the elevated worldwide publicity of computing assets. The papers during this quantity are consultant of the cutting-edge in safeguard and cryptography study, around the world. this system Committee of the convention acquired a complete of 158 submissions from world wide, of which 35 submissions have been chosen for presentation on the a- demic song. as well as this song, the convention additionally hosted a technical/ business/ brief papers song whose shows have been additionally rigorously chosen from one of the submissions. All submissions have been reviewed by means of specialists within the suitable areas.

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Additional info for Applied Cryptography and Network Security: Third International Conference, ACNS 2005, New York, NY, USA, June 7-10, 2005. Proceedings

Example text

Unlike previously proposed schemes [3, 19, 21, 22], k-RIP does not rely on the knowledge of the overlay topology. Thus, it is scalable to very large overlay networks. Organization: The remainder of this paper is organized as follows. Section 2 discusses some related work on group key management, network attacks and countermeasures. Section 3 describes the system model and our design goal. In Section 4, we present our scheme CRBR for providing both network access control and group key management, followed by its security and performance analysis.

4 Conclusion We have presented two attacks on the improved C2C-PAKE protocol proposed by Kim et al. Our attacks on this improved version are more severe than previous attacks on the original C2C-PAKE protocol proposed by Byun et al. since we do not require knowledge of any secrets nor passwords. Surprisingly, the original version is not vulnerable to our attacks. This is mainly because in order to counter the Denning-Sacco-style attack and Chen’s attack, Kim et al. [4] simply eliminated all verifiable ciphertexts and plaintexts based on the clients’ passwords.

Suppose only k2 is sent to Bob, Eve can bypass the puzzle and wait to see if Bob aborts or not. If not, she knows her guess is correct. Note z and k2 can be sent in clear. We use kq to keep the protocol consistent with the 3-pass with cookie case since a cannot be sent in clear. To keep the new protocol to be 3-pass, Bob must send cookienew in the second message. If Eve gets cookienew , but it is not useful to her as she cannot decrypt cookienew . Similar to 4-pass protocol, when Alice tries to login with a valid (cookie, ticket) pair, she is not asked to solve a puzzle.

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