Digital Phone Encryption
Cracked
Well here it is pholks -- you knew deep in your hearts that it
was vulnerable, but now some experts have shown the world exactly how much
so. You didn't think that the NSA would actually let us have secure phones
did you? No such luck. Believe me, GSM isn't much better. Get your own
encryption system if you want privacy. --DR. WHO 20.03.1997
Cryptanalysis of the Cellular Message Encryption
Algorithm
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
2^24--2^32, and finishes in
minutes or hours of computation on a standard workstation. This
demonstrates that CMEA is
deeply flawed.
Please note that much of the material in this page is from counterpane's
site. I noticed no usage limitations on their site. If they have a problem
with my page, they can contact me.
|
Copyright 1994-1997 Sinister Networks. All rights
reserved. May not be redistributed or modified without permission of
Sinister Networks. Other names and marks used in here are the property of
their respective owners, until and unless decided otherwise in a valid
court of law. The
absence of a service mark, trademark symbol or fnordmark in connection
with the marks identifying products or services of other vendors does not
indicate the absence of registration of those marks or devices. All marks
identified
herein are used or registered in the United States of
America and may or may not be used and/or registered in other countries
and planets.
|