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A Practical Fault Attack on ARX-like Ciphers with a Case Study on ChaCha20
ChaCha ARX cipher Laser
2017/11/13
This paper presents the first practical fault attack on the ChaCha family of addition-rotation-XOR (ARX)-based stream ciphers. ChaCha has recently been deployed for speeding up and strengthening HTTPS...
This note contains a security reduction to demonstrate that Langley’s composition of Bernstein’s
ChaCha20 and Poly1305, as proposed for use in IETF protocols, is a secure authenticated encryption
sc...