# Non interactive anti-exfil (airgap compatible)

**URL:** <https://delvingbitcoin.org/t/non-interactive-anti-exfil-airgap-compatible/1081>\
**Category:** Protocol Design\
**Tags:** cryptography\
**Created:** [August 20, 2024, 3:15pm UTC](https://delvingbitcoin.org/t/non-interactive-anti-exfil-airgap-compatible/1081 "2024-08-20T15:15:29Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![sipa](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/sipa/32/1100_2.png) [@sipa](https://delvingbitcoin.org/u/sipa)\
**Post date:** [August 20, 2024, 4:35pm UTC](https://delvingbitcoin.org/t/non-interactive-anti-exfil-airgap-compatible/1081/3 "2024-08-20T16:35:43Z")

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Calling it a vector commitment is perhaps a bit confusing, as that term exists in cryptography with a very different [meaning](https://eprint.iacr.org/2011/495.pdf).

I believe this is roughly Scheme 2 from [[bitcoin-dev] Overview of anti-covert-channel signing techniques](https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-March/017667.html), for ECDSA instead of Schnorr (which is based on an idea [posted](https://bitcointalk.org/index.php?topic=893898.msg9861102#msg9861102) by Greg Maxwell in 2014).

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