Failing upwards: the Twitter encrypted DM failure

This site took too long to answer. You can still read it on the original site — the toolbar below keeps your place in the directory.

Almost two years ago, Twitter launched encrypted direct messages. I wrote about their technical implementation at the time , and to the best of my knowledge nothing has changed. The short story is that the actual encryption primitives used are entirely normal and fine - messages are encrypted using AES, and the AES keys are exchanged via NIST P-256 elliptic curve asymmetric keys. The asymmetric…

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