Chacha20 - Explanation - Printable Version

Chacha20 - Explanation - Printable Version

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Chacha20 - Explanation - stamun8 - 04-17-2021

Is there any explanation about the format of Chacha20. The example is

Code:
15400 ChaCha20 20 $chacha20$*0400000000000003*16*0200000000000001*5152535455565758*6b05fe554b0bc3b3

$chacha20$*???????????????????*??*????????????????????*plaintext.................*ciphertext
Where nonce should be and is there anyway to bruteforce both key and nonce, if you know plaintext and ciphertext from ChaCha20 encryption?

Thanks