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Encrypted Cell Phones?



 
 
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  #1  
Old November 1st 13, 12:13 AM posted to alt.cellular
(PeteCresswell)
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Posts: 365
Default Encrypted Cell Phones?

Angela Merkel's situation made me wonder: is encryption of cell phone
traffic possible? I was thinking some public/private key scheme where
the callers, of course, have to have an enabled phone....

If so, is there any level of encryption that would make life difficult
for the NAS once they decided an individual was of interest?

I heard one fairly high-placed guy say to the effect of "Yes, all our
people are *supposed* to restrict all their phone calls to secured land
lines, but the daily pressure of continuous communication with people
makes it impractical so they use their cell phones."

Seems like there's a market.... government money, even.
--
Pete Cresswell
  #2  
Old November 20th 13, 04:30 AM posted to alt.cellular
Nomen Nescio
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Posts: 62
Default Encrypted Cell Phones?

Angela Merkel's situation made me wonder: is encryption of cell
phone traffic possible? I was thinking some public/private key
scheme where the callers, of course, have to have an enabled
phone....


Merkel's phone was already secure, and claimed to be "wiretap-proof".
Of course there are no absolutes and nothing stops an NSA-funded
adversary.. but it would be interesting to know what kind of security
she had.

If so, is there any level of encryption that would make life
difficult for the NAS once they decided an individual was of
interest?


An aes256 stream cipher would be hard to compromise. It's the key
exchange you need to worry about.

The most practical approach would be to have smartphones on a data
plan and connect on the Internet, and then do a diffie-helman key
exchange.

The "Linphone" and "Lumicall" apps support encryption.

Seems like there's a market.... government money, even.


A small market. It's very difficult to get the general public
interested in security.

 




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