A5/3 encryption

[#1]

Is the A5/3 encryption algorithm supported in AT&T's HSUPA network? 

[#2]

Hi ukincarlsbad,

Thanks for your post!

Can you give us a little more info on what you're trying to do?

thanks!

[#3]

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)).

Thanks

[#4]

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.