Distance of RAA Codes over Large Finite Fields (with Applications in zkSNARKs and PCGs)

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Error-correcting codes play a central role in modern cryptography, enabling efficient constructions of primitives such as zero knowledge proofs and secure multiparty computations. Among them, repeat-accumulate-accumulate (RAA) codes have recently attracted significant attention due to their linear-time encoding and good distance properties. However, prior work only established provable distance guarantees over the binary field or over finite fields whose size is smaller than the message length.