Coinkite®: @OPENDIME, 1st & only #Bitcoin bearer instrument. @COLDCARDwallet ultra-secure open hardware wallet @theBLOCKCLOCK @TAPSIGNER est. block 141,000
Bitcoin
Joined May 2013
- Tweets6.4K
- Following17
- Followers28.1K
- Likes4.7K
Coinkite retweeted
Monday, Oct. 12, 2026 update: We remain locked out of @COLDCARDwallet and are still waiting for @X to restore our access.
We are investigating how a post containing a phishing link was published from this account. It has since been deleted.
Do not visit or interact with that link. COLDCARD’s only official website is coldcard.com.
This account has used offline 2FA with tightly restricted access since 2017. We have contacted @X and are reviewing all account access.
We will share further verified updates here.
Monday, Oct. 12, 2026 update: We remain locked out of @COLDCARDwallet and are still waiting for @X to restore our access.
We are investigating how a post containing a phishing link was published from this account. It has since been deleted.
Do not visit or interact with that link. COLDCARD’s only official website is coldcard.com.
This account has used offline 2FA with tightly restricted access since 2017. We have contacted @X and are reviewing all account access.
We will share further verified updates here.
Coinkite retweeted
I’m still running @COLDCARDwallet
What else can people do? there is no peer.
Update and roll your dice.
COLDCARD is a Bitcoin-only signing device. It does not require a COLDCARD account or mandatory companion app. Pair it with compatible wallet software and keep the signing key offline.
coldcard.com/mk5
Coinkite retweeted
COLDCARD now supports #Codex32 Shamir backups for existing BIP-39 and passphrase wallets. Choose your threshold.
Same addresses. No coins moved.
In 5.6.3 and 1.5.3Q.
Save 10% when paying with Bitcoin.
Learn more blog.coinkite.com/shamir-bac…
Coinkite retweeted
COLDCARD is yours to verify, modify, and run. 👨💻
Learn how to change the open-source firmware, test it in the simulator, build a development-key DFU for Mk4/Mk5 or Q, and install it on a dedicated device.
blog.coinkite.com/build-run-…
Coinkite retweeted
🚨 New COLDCARD firmware is out: 5.6.2 for Mk4/Mk5 and 1.5.2Q for Q.
View TRNG Words is back. We also added an offline tool to verify dice-roll or coin-flip mixing, USB ncry v3, and more transaction, Virtual Disk, firmware and wallet-state fixes.
Please update promptly:
coldcard.com/downloads
Full notes:
blog.coinkite.com/coldcard-f…
Coinkite retweeted
How the new COLDCARD seed generation works (MK4/MK5 ≥5.6.1 and Q ≥1.5.1Q):
Track the security status here: coldcard.com/security/status
Explore the interactive tool and source code here: scgbckbone.github.io/seedflo…
Coinkite retweeted
🚨 New COLDCARD firmware is available: 5.6.1 for Mk4/Mk5 and 1.5.1Q for Q.
This release follows three weeks of sustained review since our July 31 hotfix. We continue to acknowledge the customers who suffered severe financial losses from the seed-generation attack.
Every newly generated seed now requires one source of user entropy: at least 65 key presses with unpredictable timing, 50 physical dice rolls, or 128 physical coin flips. This input is combined with fresh entropy from the STM32 TRNG, SE1, and SE2.
The release also adds staged-PSBT verification immediately before signing, stronger USB and firmware-update boundaries, improved Delta Mode isolation, active-wallet backup fixes, stronger RNG initialization and fault checks, safer SIGHASH defaults, and many additional security and correctness improvements.
Important: Updating does not repair an existing seed generated on affected firmware. If the advisory applies to your seed, update your device, generate and verify a new seed, then move your funds.
We strongly recommend that all Mk4, Mk5, and Q users update and verify the signed firmware download.
Thank you to every researcher who reported issues, reproduced edge cases, reviewed fixes, and helped make this release stronger.
blog.coinkite.com/coldcard-s…
🚨 URGENT: The threat is still active.
Follow the advisory for your model: update your COLDCARD, generate a new seed, then carefully move your funds.
Please share this with less-online users who may not see it.
xitter.cf/COLDCARDwallet/status/…
🚨URGENT COLDCARD SECURITY UPDATE
Read carefully before acting.
👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.
👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.
blog.coinkite.com/entropy-te…
Coinkite retweeted
Please treat this as urgent. Migrate your funds. Follow the advisory for your model, upgrade your device, generate a new seed, and carefully move your funds.
Help spread the word, especially to people who are less online and may not see this update.
The threat is still ongoing.
🚨URGENT COLDCARD SECURITY UPDATE
Read carefully before acting.
👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.
👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.
blog.coinkite.com/entropy-te…
Coinkite retweeted
COLDCARD FIRMWARE HOTFIX UPDATE CAN BRICK DEVICES
A new bug has been identified in COLDCARD’s emergency firmware hotfix.
While the update fixes the original entropy vulnerability, researchers say a temporary hardware RNG error can leave the device stuck on a fatal error screen before the PIN prompt, preventing users from accessing the upgrade menu.
Coinkite retweeted
COLDCARD Mk3 Security Advisory
If you generated a seed on a Mk3 after firmware 4.0.1, your funds may be at risk.
Mk4, Q and Mk5 are not affected based on our early analysis.
Read the advisory and migrate carefully:
blog.coinkite.com/coldcard-m…
Coinkite retweeted
arca - your personal data haven.
Reservations are now open: store.coinkite.com/store/cat…
Meet arca🌐🔐
A physical digital safe that gives your most important secrets a dedicated home instead of leaving them scattered across devices, cloud accounts, & paper notes
Founders Edition reservations are now open
store.coinkite.com/store/arc…
learn more blog.coinkite.com/arca-reser…
Coinkite retweeted
Secure your Ledger with COLDCARD.
Instead of generating a recovery phrase on your Ledger, derive a BIP85 child seed on your COLDCARD completely airgapped, then restore it to your Ledger.
Your Ledger gets its own independent wallet, while your COLDCARD remains the source.
Coinkite is hiring Production Manager and Designer.
coinkite.com/careers#Product…
coinkite.com/careers#Sr%20De…
Coinkite retweeted
This week sadly the physical parisian Bitcoin Bazar shop closed permanently. It was a hell of an adventure and the online shop is still here shipping bitcoin stuff privately.
And to thank all of you people that supported us until now we are giving away a legendary @Coinkite BlockClock Mini.
The iconic device that birthed the "Moscow Time" meme.
Remember, March 2021, dystopian times. Jack Dorsey testifies before US Congress with a BlockClock behind him displaying "1952".
A researcher swore it was set to Moscow time… Either Jack is an evil spy spreading misinformation online and not censoring strong enough or.... it is actually just the number of sats you could buy with $1 🤡
Ever since, bitcoiners have been "living on Moscow Time"
Display block height, price, halving countdown, the ultimate and much more. The ultimate bitcoiner shelf piece.
To enter:
1- Follow @bitcoinbazar21
2- Tag one fellow pleb who could be interested in entering
3- RT
You have 5 days to enter until the 21th of May 11:59 pm. Free Shipping in Europe.
Coinkite retweeted
It’s a shame to lose another leading Canadian technology company due to poor government policies.
C-22 will cost Canada good manufacturing job, ours included. We’re already working on leaving-this bill just accelerates the timeline
You can’t build privacy hardware in a country that mandates surveillance backdoors
#BillC22 is tyranny dressed up as public safety
Elbows up 🇨🇦