**Folder Structure:**

- `isapa128av20`: Code for ISAP128a using Ascon-p (primary recommendation).
- `isapa128v20`: Code for ISAP128 using Ascon-p.
- `isapk128av20`: Code for ISAP128a using Keccak-p[400].
- `isapk128v20`: Code for ISAP128 using Keccak-p[400].
- `isapxv20`: A generic codebase that can be used to build reference code for all four instances of ISAP.