# Lamport signatures and other CAT tricks

**URL:** <https://delvingbitcoin.org/t/lamport-signatures-and-other-cat-tricks/236>\
**Category:** Protocol Design\
**Created:** [December 2, 2023, 11:15pm UTC](https://delvingbitcoin.org/t/lamport-signatures-and-other-cat-tricks/236 "2023-12-02T23:15:49Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![moonsettler](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/moonsettler/32/38_2.png) [@moonsettler](https://delvingbitcoin.org/u/moonsettler)\
**Post date:** [February 16, 2024, 12:18pm UTC](https://delvingbitcoin.org/t/lamport-signatures-and-other-cat-tricks/236/19 "2024-02-16T12:18:37Z")

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interesting! do we have an example script (even just a partial like a single cycle), how this could look like? we are talking abut calculating any 32 bit portion of a SHA256 hash correct?

afaik the naive implementation relies on a lot of binary operations not available in bitcoin script. bitwise XOR, ROTR, SHIFTR, NOT, AND…

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