Creation of this document was prompted by recent discussion on the Bitcoin Cash Research (BCR) forum regarding a potential upgrade of the long-used P2SH feature. The proposed upgrade would enable an additional BIP-0016 output template, one with a 32-byte hash, aimed at addressing a long standing cryptographic collision problem. We have taken the opportunity to create this comprehensive P2SH document, including complete details of our preferred solution to the collision problem.

Contents:

1. Introduction to P2SH Feature
2. Technical Debt
3. Cryptographic Security Level
4. Preferred Upgrade
5. Post-quantum Cryptographic Security Level
6. Potential Future Upgrades
7. Pay-to-Public-Key-Hash (P2PKH) Outputs

The rest of the text can be found here:

• read cash: https://read.cash/@bitcoincashnode/bchn-technical-bulletin-2022-06-09-d76f7a1c
• GitLab: https://gitlab.com/bitcoin-cash-node/announcements/-/blob/master/2022-06-09_bitcoin_cash_pay_to_script_hash_p2sh_past_present_and_future_EN.md