Coinkite / Coinkite is on Nostr

Coinkite: OPENDIME, 1st & only #Bitcoin bearer instrument. COLDCARD ultra-secure open hardware wallet. BLOCKCLOCK. TAPSIGNER. And more! est. block 141,000

Last Notes

2024-09-14 01:42:10

What is your favorite color?
https://m.primal.net/KpIX.jpg

2024-09-12 21:21:33

#COLDCARD Firmware Upgrade!
## SeedXOR
🌳XOR from Seed Vault (select other parts of the XOR from seeds in the vault). Restore geographically distributed SeedXOR without physically bringing the parts together
📸Seed XOR seeds can be scanned f/ SeedQR instead of typing them by hand
## Multisig
🔐Option for unsorted multisig [multi(…)]
📝JSON wrapped imports to provide custom `name` instead of the filename. Most useful for USB and NFC imports which have no filename
🔬Descriptor checksum is no longer required upon import
⛓️‍💥Create Airgapped (aka using CC as multisig coordinator) now works with BBQRs
## QR File Share
📁Same as NFC file share, allows user to share any file from SD card via QR/BBQr
## Optimizations and speed
🍄 #libsecp256k1 bumped to latest 0.5.0 (point multiplication algorithm speed up, etc)
🐇⚡️improvements in our signature grinding algo. Updated libsecp plus our optimizations yield 30% improvement in signing speed over previous version (15% in overall signing speed as signing is not the only part of it (validation, change checks, etc.))
## Security
🧐Improve side-channel protection: libsecp256k1 context randomization now happens before each signing session
And much more! Details here https://blog.coinkite.com/5.4.0-released/
https://m.primal.net/Knzw.jpg

2024-09-09 01:38:27

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There are

2024-09-07 20:51:00

Learn how to use #COLDCARD Q's covert calculator mode!
Learn more at coldcard.com
https://m.primal.net/KiXh.mov

2024-09-06 21:56:02

Tapscript is happening
https://m.primal.net/KhIg.jpg

2024-09-03 22:44:06

🔒🔒🔒 #COLDCARD team takes minimizing supplier trust to the extreme!
We use 2️⃣ different vendors for secure elements, and the COLDCARD architecture requires
3️⃣ different chips to be broken in order to access the seed. 🔒🔒🔒
Learn more here https://blog.coinkite.com/understanding-mk4-security-model/
https://m.primal.net/Kcmt.jpg

2024-08-06 00:23:59

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2024-08-06 00:05:08

Hello! 👋