# Universal opt-in replay protection?

**URL:** <https://delvingbitcoin.org/t/universal-opt-in-replay-protection/2792>\
**Category:** Protocol Design\
**Tags:** softfork\
**Created:** [August 9, 2026, 10:43pm UTC](https://delvingbitcoin.org/t/universal-opt-in-replay-protection/2792 "2026-08-09T22:43:18Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![ajtowns](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/ajtowns/32/417_2.png) [@ajtowns](https://delvingbitcoin.org/u/ajtowns)\
**Post date:** [September 9, 2026, 4:41pm UTC](https://delvingbitcoin.org/t/universal-opt-in-replay-protection/2792/12 "2026-09-09T16:41:25Z")

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You don’t need a new segwit version to do that, just a new public key encoding for taproot CHECKSIG, similar to the BIP 118 APO approach.

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_[View the full topic](https://delvingbitcoin.org/t/universal-opt-in-replay-protection/2792)._