Why is the rainbow signature the strongest post-quantum encryption algorithm?

After the release of NSM10, everyone should pay attention to the post-quantum signature algorithm. Compared with the major signature algorithms of NIST PQC, only the rainbow signature algorithm is most suitable for decentralized encryption. At the same time, the rainbow signature algorithm is based on NP problems and is mathematically unsolvable, so it is still relatively safe.

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The eighth "National Security Memorandum" NSM10 issued by the White House on January 19, 2022 clearly requires US agencies to make special work in anti-quantum algorithms, heralding the beginning of a new era of quantum resistance. All cryptocurrencies, including Bitcoin, must upgrade their digital signature algorithms, which are vulnerable to quantum computer attacks, to quantum-resistant digital signature algorithms:

https://www.whitehouse.gov/briefing-room/presidential-actions/2022/01/19/memorandum-on-improving-the-cybersecurity-of-national-security-department-of-defense-and-intelligence-community-systems/

NSM1000000000000000000000000000 states:

(B) Within 60 days of the date of this memorandum, the National Security Agency shall revise and provide to the Chief Information Officer CNSS Advisory Memorandum 01-07 (Modernization of Information Assurance Cryptographic Equipment), and any related attachments and related references, including modernization plans, use of unsupported cryptography, approved mission-unique protocols, quantum-resistant protocols, and plans for the use of quantum-resistant cryptography when necessary.