How to Reverse Engineer an EES Device
نویسنده
چکیده
Clearly, something in the system has to be secret. The goal of EES is that government agencies will be able to tap telephone calls, but no-one else will. To achieve this, the government must have, or know, something that no-one else does. This something is the Unit Key (KU), a cryptographic key which is different for every telephone. The basic idea is that if you know a phone’s unit key you can tap it, and if you don’t you can’t.
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