Affiliation:
1. University of California, San Diego, La Jolla, CA
2. Thammasat University, Patumtani, Thailand
Abstract
The
secure shell
(SSH) protocol is one of the most popular cryptographic protocols on the Internet. Unfortunately, the current SSH authenticated encryption mechanism is insecure. In this paper, we propose several fixes to the SSH protocol and, using techniques from modern cryptography, we prove that our modified versions of SSH meet strong new chosen-ciphertext privacy and integrity requirements. Furthermore, our proposed fixes will require relatively little modification to the SSH protocol and to SSH implementations. We believe that our new notions of privacy and integrity for encryption schemes with stateful decryption algorithms will be of independent interest.
Publisher
Association for Computing Machinery (ACM)
Subject
Safety, Risk, Reliability and Quality,General Computer Science
Reference35 articles.
1. Bellare M. Kohno T. and Namprempre C. 2004. SSH Transport Layer Encryption Modes. Available at http://www.ietf.org/html.charters/secsh-charter.html.]] Bellare M. Kohno T. and Namprempre C. 2004. SSH Transport Layer Encryption Modes. Available at http://www.ietf.org/html.charters/secsh-charter.html.]]
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