Cryptanalysis of the cellular message encryption algorithm
David Wagner,Bruce Schneier,John Kelsey +2 more
- 17 Aug 1997
- pp 526-537
TL;DR: In this paper, the authors present an attack on CMEA which requires 40-80 known plaintexts, has time complexity about 224-232, and finishes in minutes or hours of computation on a standard workstation.
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Abstract: This paper analyzes the Telecommunications Industry Association's Cellular Message Encryption Algorithm (CMEA), which is used for confidentiality of the control channel in the most recent American digital cellular telephony systems. We describe an attack on CMEA which requires 40–80 known plaintexts, has time complexity about 224–232, and finishes in minutes or hours of computation on a standard workstation. This demonstrates that CMEA is deeply flawed.
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Citations
Local Shannon entropy measure with statistical tests for image randomness
TL;DR: The proposed local Shannon entropy measure overcomes several weaknesses of the conventional global Shannon entropyMeasure, including unfair randomness comparisons between images of different sizes, failure to discern image randomness before and after image shuffling, and possible inaccurate scores for synthesized images.
Twofish : A 128-bit block cipher
Bruce Schneier
- 01 Jan 1998
TL;DR: The design of both the round function and the key schedule permits a wide variety of tradeoffs between speed, software size, key setup time, gate count, and memory.
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Minho Shin,Justin Ma,Arunesh Mishra,William A. Arbaugh +3 more
- 23 Jan 2006
TL;DR: This paper provides a comprehensive discussion of security problems and current technologies in 3G and WLAN systems, and provides introductory discussions about the security problems in interworking, the state-of-the-art solutions, and open problems.
Does open source improve system security
TL;DR: It is tentatively concluded that having source code available should work in favor of system security, and is source code access a net gain or loss for security?
SafeSlinger: easy-to-use and secure public-key exchange
Michael W. Farb,Yue-Hsun Lin,Tiffany Hyun-Jin Kim,Jonathan M. McCune,Adrian Perrig +4 more
- 30 Sep 2013
TL;DR: SafeSlinger is a system leveraging the proliferation of smartphones to enable people to securely and privately exchange their public keys, which establishes a secure channel offering secrecy and authenticity, which is used to support secure messaging and file exchange.
References
Decrypting the puzzle palace
TL;DR: It seems a highly opportune time, directly following the authors' dis-orienting victory in the Cold War, to ask if the threats from which the NSA purportedly protect us are as significant as the hazards its activities present.
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