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< This is old news, but I haven't updated this blog in a while. In any case, here's a good read:
< == https://moxie.org/blog/telegram-crypto-challenge/
< Please check out the whole article, but here is a TL;DR anyway:
< “If Telegram wants to prove that their protocol is better than this absolute garbage protocol, then I challenge them to publish the plaintext of Alice’s message. […] Here we have a messaging protocol that employs the NSA backdoored random number generator (Dual_EC_DRBG), weak public key cryptography (896bit RSA, no padding, no signatures, no authenticity), the worst cryptographic hash function possible as a KDF (MD2), and XOR as a cipher.”
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