"privatizing" phones?

[Cerridwyn Llewyellyn]

>> Even if they did change the frequency the call was on, 
>> it would be a simple matter to decode how the frequency
>> change was negotiated, and "follow" the call (also easily
>> accomplished with cellular calls).  Failing that, there is 
>> a very limited range of frequencies allocated for cordless 
>> fones, and simply re-scanning for the conversation is a 
>> trivial inconvenience. //cerridwyn//
>Most of those systems do also change the order of the transmitted data, and 
>that's not limited to a few possibilities. If it's digital, they usually 
>encrypt it (only weak, but hey, you normally have to find the key real 
>time!)

Right.  After posting that, I realized I forgot to specify I was only
referring to analog cordless/cell fones.  Digital is a bit of a different
story, as it requires more sophisticated equipment to decode.  Still not
secure though.  (right now it's simply obscure).  //cerridwyn//