[liberationtech] About Telegram

[Tony Arcieri]

On Thu, Feb 20, 2014 at 2:59 PM, Maxim Kammerer <mk at dee.su> wrote:

> You called the contest a farce and the product a snake oil based on what
>

The fact that their scheme is at best equivalent to CBC mode (they even
note this in their technical FAQ. I can only guess it's something they
didn't know when they started developing their scheme), but much more
convoluted, and does not provide the integrity guarantees / IND-CCA2
security of an authenticated encryption mode. Off-the-shelf authenticated
encryption modes like GCM or (EC)IES address all of these problems. Their
scheme is not only needlessly convoluted, but completely unnecessary, and
at worst insecure.
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