Edge Firmware [developer preview] for Mk4
Announcing: Edge Firmware for Coldcard Mk4
May 12, 2023
Version 5.1.2 for Mk4 Released
Minor Mk4 Release: Version 5.1.2
Apr 7, 2023
Version 5.1.0 for Mk4 Released
Huge Mk4 Release! Version 5.1.1 (was 5.1.0)
Feb 27, 2023
COLDCARD Q1 Early-Bird reservation starts now.
Meet the COLDCARD Q1
Feb 9, 2023
Understanding The COLDCARD Mk4 Security Model and Secure Element Use
Understanding The COLDCARD Mk4 Security Model and Secure Element Use
Jan 10, 2023
Everything You Need To Know About Passphrases
A Brief on Private Keys & Wallets
Nov 25, 2022
Version 5.0.6 Security Update (Virtual Disk)
Version 5.0.6 Security Update for Virtual Disk
Jul 29, 2022
Announcing SATSCARD & TAPSIGNER
Announcing SATSCARD & TAPSIGNER
Jan 24, 2022
COLDCARD Mk4 Early-Bird reservation ( $40 OFF) starts now.
Excited to announce the Early Bird reservation of COLDCARD Mk4, get $40 off as many units as you’...
Jan 23, 2022
Version 4.1.3 Released (PSBT support in Core)
Enhancements
Sep 2, 2021
Version 4.1.2 Released (More QR Codes)
Enhancements
Jul 28, 2021
Version 4.1.0 Released (Seed XOR Feature)
Apr 29, 2021
Version 4.0.2 Released (Countdown to Brick feature)
New feature: “Countdown to Brick”
Apr 7, 2021
Version 4.0.0 Released (Major Internal Improvements)
All New Code, Same Great Features
Mar 17, 2021
Version 3.2.2 Update Recommended (Multisig Security Update)
Security Fix (Multisig Users)
Feb 9, 2021
Version 3.2.2 Released (Major Address Explorer Improvements)
Major Multisig Improvements!
Jan 14, 2021
Version 3.2.1 Released (Major Multisig Enhancements)
Major Multisig Improvements!
Jan 8, 2021
Testnet Considered Useful
The Aledged Problem
Nov 24, 2020
Version 3.1.8 Released (Lots of enhancements)
Major Performance Boosts!
Aug 4, 2020
Version 3.1.4 Released (BIP-85 added / BIP-143 defences)
Security Fix (BIP-143 replay attack)
Jun 12, 2020
BIP-143 Vulnerability
A security researcher has reportedan attack leveraging an knownissue with how BIP-143 commits to ...
Jun 3, 2020
Laser Fault Injection
Ledger’s Donjon lab has posted anew security report regarding the older Coldcard Mk2 ....
May 18, 2020
SEEDPLATE Bitcoin metal backup
May 5, 2020
Coldcard firmware update: 3.1.3
Apr 30, 2020
COLDPOWER 9volt Battery to USB
Apr 1, 2020
Blockclock Firmware updated
Firmware Upgrade Time!
Mar 30, 2020
Supply Chain Trust Minimized
Just getting a legit Coldcard into your hands is the hard partsometimes—not just with internation...
Mar 2, 2020
Version 3.0.6 Released (Security Update)
Security Fix (Multisig Users)
Dec 19, 2019
Login Countdown and Nickname
With 3.0.3 release we have two new optional features, Login Countdown and Device Nickname.
Nov 6, 2019
Troublesome Change Outputs
Nov 1, 2019
Coldcard Hardware Details
Today we have posted all the information you need to be able tobuild your own Coldcard from off-t...
Oct 25, 2019
Affiliate Program (Beta)
We now have an affiliate program for all Coinkite products. It’s pretty simple: we payyou when ou...
Oct 24, 2019
Coldcard Address Explorer
Firmware update for powerful new feature: "The Address Explorer"
Oct 8, 2019
Coldcard™ Mark 3 Announcement
Aug 26, 2019
Possible Information Leak, Considered Unlikely
Aug 7, 2019
Keep Your Pins Long, and Your Peace of Mind Intact
Jan 28, 2019
Announcing: Coldcard™
The World Needs An Open, Cheap & Ultrasecure Hardware Wallet! Pre-Order Now
Dec 8, 2017
Announcing: Opendime V3
You might have noticed that the Opendime store is out-of-stock.
Aug 22, 2017
Opendime V2: Cyberpunk Credsticks Return
The OpenDime (OpenDime.com) is one of those projects which really captures the imagination. Lik...
May 20, 2017
Announcing: Chrome Extension for Opendime
Just as we were finalizing the firmware for V2 of Opendime(now shipping, by the way) we discovere...
Mar 8, 2017
Announcing: Opendime v2 – Now Genuine Verified Bitcoin Credit Stick
Opendime is a small USB stick that allows you to spend Bitcoin like a dollar bill. Pass it along ...
Dec 27, 2016
Real Life Cyberpunk Cred Sticks: Opendime
If there’s ever any doubt that we’re currently living in a cyberpunk world, then the OpenDime (...
Sep 14, 2016
The Bitcoin Game Interview With Opendime Team
Hello, welcome to episode 38 of The Bitcoin Game. I’m Rob Mitchell.It’s always great interviewi...
Aug 21, 2016
Exquisite Opendime
When we first read about OpenDime, the hardware Bitcoin Wallet, we were exited by what they app...
Aug 5, 2016
Friends of Satoshi Opendime Video: The Zero-Trust Bitcoin Stick
The 1st Bitcoin Bearer Bond or just call it a “Bitcoin Stick”.
Aug 4, 2016
Multiple Languages on Opendime Interface
Since Opendime v1.1 multiple languages are supported right in the User Interface. 中文 🇨🇳, 日本語 🇯🇵, ...
Aug 1, 2016
Opendime Unboxings!
Opendime is a new way to transact Bitcoin in physical form. It’s basically a bearer bond for Bitc...
May 6, 2016
Video: World's First Bitcoin Bearer Bond–A Bitcoin Stick!
Watch a demo of the world’s first bitcoin bearer bond–a bitcoin stick! Opendime is a small USB st...
Apr 27, 2016
