All Questions
Tagged with chacha protocol-design
5
questions
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xChaCha20 Block Keys for Poly1305
So xChaCha20 has a nonce size large enough to safely use a random nonce with the same key. Poly1305 generally uses the first block of the cipher's output to generate its nonce. For xChaCha20 it would ...
- 123
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Is this a reasonable design for encrypting records in a key/value database?
A while back I designed a protocol for en encrypted key/value service. My main goal was to minimize the value of a breached database by using cryptographic algorithms where a brute-force cracking ...
- 101
6
votes
1
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Reason for 3 rounds ChaCha in ChaCha20Poly1305@openssh
OpenSSH uses a slightly different ChaCha20Poly1305 AEAD construct then the one proposed by A. Langley and others for TLS.
The TLS version
The openSSH version (and here)
The openSSH version uses two ...
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4
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Challenge / Response to Prevent Replay Attack - Using nonce as challenge
I am implementing a radio protocol and trying to prevent replay attacks. It is an embedded system so storing nonce values is not an option, as each node in the system may talk to each other.
My plan ...
3
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1
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Using ChaCha20 on very short messages with high packet loss
I'm building a low power wireless network and need to transmit very small packets at regular intervals (10 bytes every minute or so). In order to secure the communications I'm considering using ...
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