Extending the SPHINCS+ Framework: Varying the Tree Heights and Chain Lengths

본문 미리보기

The SPHINCS+ framework provides the underlying architecture for modern quantum resistant stateless hash-based signatures. Notable examples include the NIST standard SLH-DSA and its recent variants such as SPHINCS-α and SPHINCS+C. We extend the hypertree structure that underlies the SPHINCS+ framework by allowing trees of different heights to appear on different layers, and we plug generalized hash-based one-time signatures with chains of different lengths into the hypertree. We give a reduction