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ChaCha is a family of stream ciphers proposed by Daniel J. Bernstein, as an evolution of Salsa20 with (conjecturally) improved resistance to cryptanalysis.

2 votes
2 answers
3k views

Is it safe to use a timestamp to build a nonce?

I'm writing an application, which can be used on multiple clients, and share data on a server. To make sure the data never leaves the clients unencrypted, the application should offer encryption with …
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