Parity-Based Concurrent Error Detection Schemes for the ChaCha Stream Cipher

TL;DR

This paper introduces two parity-based error detection schemes for the ChaCha stream cipher's Quarterround, balancing implementation complexity and error coverage to enhance fault tolerance.

Contribution

It presents novel parity-based concurrent error detection methods specifically designed for the ChaCha cipher's Quarterround operation.

Findings

Second scheme detects any odd-weight error on signals

First scheme has lower implementation overhead

Both schemes improve fault detection in ChaCha cipher

Abstract

We propose two parity-based concurrent error detection schemes for the Quarterround of the ChaCha stream cipher to protect from transient and permanent faults. They offer a trade-off between implementation overhead and error coverage. The second approach can detect any odd-weight error on the in-/output and intermediate signals of a Quarterround, while the first one requires less logic.