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Does this mean that you were unable to recover Alice's message?

Alas, I am not a cryptographer and not even a member of the Telegram team. I'm just a guy who backs Telegram financially and proposed to start their contest. I described my motives behind it here https://news.ycombinator.com/item?id=6938622

As for your contest, I will make sure the Telegram team will have a look at it once they are awake. As far as I understand, you designed it to be similar to Telegram's contest. How do you send messages that affect traffic in real-time? How large is the prize? Is there a deadline?

You can generate your own messages according to the scheme he gave (even using the same public key from Bob if you like), but they will not be aggregated into a public log.

Have you taken part in Telegram contest design?

> How large is the prize?

I think the "prize" is obvious. Breaking this "unbreakable" 896bit-RSA + no auth + no signature + MD2 + XOR is a necessary condition for the Telegram contest to be taken seriously.

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