Replay protection isn't about DoS attacks. Replay protections is about re-injecting previous messages to confuse recipient.
Well, you just made it painfully clear that at least one member of your team doesn't understand what a replay is.
In light of that, why would anyone in their right mind use a security product your organization developed?
Re:Telegram - secure, free messaging
by danabramov on Saturday December 21, 2013 @09:39AM
(#6946755)
Please mind that Telegram team are not native English speakers.
We could employ additional filtering techniques, but that increases processing time. And since modern hardware allows for very fast AES decryption, there is no particular gain in building additional layers of protection.
All that, naturally, implies that other anti-DoS measures are also being used.