# Safecat: a CLI tool to for digital signatures using Baby Jubjub Elliptic and Poseidon

**URL:** <https://forum.aztec.network/t/safecat-a-cli-tool-to-for-digital-signatures-using-baby-jubjub-elliptic-and-poseidon/4122>\
**Category:** Noir\
**Created:** [February 22, 2024, 7:53am UTC](https://forum.aztec.network/t/safecat-a-cli-tool-to-for-digital-signatures-using-baby-jubjub-elliptic-and-poseidon/4122 "2024-02-22T07:53:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![neiman](https://avatars.discourse-cdn.com/v4/letter/n/f17d59/32.png) [@neiman](https://forum.aztec.network/u/neiman)\
**Post date:** [February 22, 2024, 7:53am UTC](https://forum.aztec.network/t/safecat-a-cli-tool-to-for-digital-signatures-using-baby-jubjub-elliptic-and-poseidon/4122/1 "2024-02-22T07:53:29Z")

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Hi everyone!

I wrote a Rust project for generating, signing, and verifying digital signatures using EdDSA _Baby Jubjub Elliptic Curve_ signatures and a _Poseidon hash function_.

The outputs of this tool work with Noir, so I thought maybe people here would be interested in taking a look.

Here’s the [introduction article](http://neimanslab.org/2024-02-19/safecat.html). The last section shows an example of how to use it with Noir.

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**Author:** ![Savio](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.aztec.network/savio/32/21_2.png) [@Savio](https://forum.aztec.network/u/Savio)\
**Post date:** [February 23, 2024, 1:29pm UTC](https://forum.aztec.network/t/safecat-a-cli-tool-to-for-digital-signatures-using-baby-jubjub-elliptic-and-poseidon/4122/2 "2024-02-23T13:29:05Z")

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Very cool, this should come in pretty handy for some in the community 👀

If you haven’t yet, highly recommend Tweeting it and sharing it on the [Noir Discord](https://discord.gg/JtqzkdeQ6G) with the bigger community 👨‍👩‍👧‍👦

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**Author:** ![neiman](https://avatars.discourse-cdn.com/v4/letter/n/f17d59/32.png) [@neiman](https://forum.aztec.network/u/neiman)\
**Post date:** [February 27, 2024, 3:27pm UTC](https://forum.aztec.network/t/safecat-a-cli-tool-to-for-digital-signatures-using-baby-jubjub-elliptic-and-poseidon/4122/3 "2024-02-27T15:27:15Z")

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Thanks! I’ll share it on Discord then, I just wanted to do it on the forum first.