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Nostr signing device on a smartcard is now a reality 🔥
878 sats \ 12 comments \ @Satochip_ 26 Feb nostr
Tech team is on fire 🔥

Firmware info

The Satcohip v0.14-0.2 with Schnorr support for Taproot & Nostr is out.
🔊 Compared to v0.12, v0.14 adds the following functionalities:
  • Schnorr signature support for Taproot (to be used with @SparrowWallet);
  • Schnorr signature support for Nostr (no key tweaking).
Source: https://github.com/Toporin/SatochipApplet/releases/tag/v0.14-0.2

Join the beta test

Want to try? Join the beta testers by ordering a DIY compatible smartcard and enjoy a -25% discount!
The smartcard will come with the pre-loaded Satochip v0.14-0.2 applet with Taproot & Nostr support - AND - the default loading keys.
Perfect to build your next Nostr signing device.

Info

Order here: https://satochip.io/product/card-for-diy-project/ Coupon code: Nostr-25%
Readme: https://github.com/Toporin/pysatochip/blob/master/README-CLI.md
Some basic commands are:
  • Import a private key on slot #0:
python3 satochip_cli.py --verbose satochip-import-privkey --keyslot 0 --privkey aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899
  • Get the corresponding public key:
python3 satochip_cli.py --verbose satochip-get-pubkey-from-keyslot --keyslot 0
  • Sign Nostr event:
python3 satochip_cli.py --verbose satochip-sign-nostr-event --keyslot 0 --message "Hello, world" --kind 1 --broadcast
Submit your feedbacks on Telegram: https://t.me/Satochip
🙏 Thank you 🙏
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21 sats \ 0 replies \ @TheMorningStar 27 Feb
Amazing! My best wishes to the project.
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10 sats \ 1 reply \ @hugomofn 27 Feb
Hey guys! Hugo from nunchuk.io here. Congrats on this!
Do you support two-round signing / MuSig2 protocol?
We have added support for Schnorr + MuSig2 recently to Nunchuk (https://nunchuk.io/blog/taproot-multisig). Would be cool to have Satochip integrated in Nunchuk and get MuSig2 working with a hardware signing device.
If you're interested, shoot me an email hugo@nunchuk.io !
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0 sats \ 0 replies \ @Satochip_ OP 4 Apr
Sorry, missed your reply. As said earlier today, yes, that something we will def have a look at 👀
Let's make it a reality!
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5 sats \ 0 replies \ @hasherstacker 26 Feb
The beauty of Nostr!
Anyone can host notes. With X, only musk can host notes.
Thank you for sharing
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0 sats \ 0 replies \ @chaoticalHeavy 27 Feb
Looks like all you need is a reader.
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0 sats \ 3 replies \ @BlokchainB 26 Feb
Sounds great but don’t app need to have the ability to read from NFC?
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76 sats \ 2 replies \ @Satochip_ OP 4 Apr
ability to read from NFC? Modern mobile have NFC reader. Satochip's smartcards have dual-interfaces: contact (with a chipcard reader) and contactless via NFC.
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0 sats \ 1 reply \ @BlokchainB 4 Apr
The point of this is to keep your nostr key safe offline?
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0 sats \ 0 replies \ @JustinNakamoto 5 Nov
It does multisig, which is the point, IMHO. It's more secure that a hot wallet, and less secure than a Ledger etc ....
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0 sats \ 2 replies \ @030e0dca83 26 Feb
Explain me like I'm 10. From today I can use nostr without sroring private key inside explorer extension, innit?
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13 sats \ 1 reply \ @Satochip_ OP 26 Feb
Currently, all Nostr clients store private keys within their apps, whether as a web extension or mobile app.
With Satochip, we provide a secure element to store private keys externally, enhancing security.
This beta version is CLI-only for now, but with positive feedback, we may develop software integration.
For example, you could use Amethyst (or similar apps) with a Satochip NFC smartcard, keeping private keys outside the app—boosting security without sacrificing convenience.
On desktop, Satochip works with a conventional smartcard reader, and with proper integration, a single card could be used across multiple Nostr clients.
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0 sats \ 0 replies \ @030e0dca83 26 Feb
Wow, it's mind-blowing
For me this was odd why does nostr use not so secure model to store keys
Your invention should amend this issue, I believe
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