03.16.2010 01:36 PM
Trying to do? Well, nothing really but it's research on behalf of others considering launching devices and/or secure applications. There has been press about the fallibility of the old A5/1 encryption algorithm used in GSM/UMTS and I was wondering if the newer and more robust A5/3 algorithm is implemented in AT&T's network.
(AT&T have been publicly deploying HSUPA technologies for high speed uplink data and, according to the standards, A5/3 is a mandatory with "Release 6" of the standards (which standardizes HSUPA)).
03.17.2010 02:45 PM
A5/3 is for GSM. For the most part our RAN supports A5/3 but I don’t believe any mobile device vendors have implemented it. So, you will see A5/1 on our network.
UMTS equivalents are UEA (UMTS Encryption Algorithm) for ciphering and UIA (UMTS Integrity Algorithm) for integrity protection.
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