Security Cryptography Whatever cover image

Telegram with Matthew Green

Security Cryptography Whatever

NOTE

Secure Connections Require Thoughtful Key Exchange

A secure messaging application should implement a public key exchange mechanism, similar to Telegram. This involves publishing a public key and uploading it to a central server. Additionally, to facilitate connections during offline periods, the application should send the initial steps of the key exchange protocol multiple times to the server. This strategy ensures that messages can be received even when the user’s device is offline, as the first moves of the key exchange are readily available for incoming communication.

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