COLDCARD has officially launched new Firmware for the ColdCard Q (1.3.4Q) and ColdCard MK4 (5.4.4) with outstanding improvements in security features and user experience. This is a notable update for anyone concerned about Bitcoin security.
What’s new in this COLDCARD firmware release?
Seed XOR: Dispersed Security with Seed Vault
A key improvement is support for XOR from Seed Vault. XOR allows you to combine two functioning private keys to make a new key, much like a complex passphrase. With support for this feature, you can:
- Get the XOR Seed Parts directly from your Seed Vault.
- Recover your dispersed Seed XOR across multiple locations without needing to bring all the seeds together in one spot.
- With the COLDCARD Q, you can scan the seed parts from SeedQR sheets for convenience.
This offers convenience while also making seed management safer in recovery situations.
Multisig: More flexible and easier to use
The new firmware also brings several changes for multisig wallets:
- Users can turn off BIP-67 compliance (pubkey sorting), which allows importing descriptors with more options.
- Support for importing JSON wrappers for custom naming, especially helpful when working via USB or NFC.
- It removes the requirement for a checksum when importing a descriptor (though if one is present, it must be correct).
- With the COLDCARD Q, creating airgapped multisig wallets now supports BBQRs in addition to MicroSD.
These improvements make multisig more flexible and user-friendly.
Performance and security: Faster, safer
COLDCARD upgraded libsecp256k1 to version 0.5.0, which brings:
- Transaction signing speed increased by about 30%.
- Overall signing time is about 15% faster due to the optimization of “signature grinding for positive R.”
- Enhanced security thanks to context randomization performed before every signing session, which reduces the risk of side-channel attacks.
This is a significant improvement, especially useful for users who need to sign many complex transactions.
Bug fixes & general improvements
Both the Mk4 and Q versions received many patches and refinements:
- Prevented an error when importing multisig with duplicate keys.
- Reduced memory usage by not reading the entire PSBT when finalizing a transaction.
- Now requires a minimum of 2 parts when recovering a Seed XOR.
- Fixed a bug in the Seed Vault menu display and correctly handled null data in OP_RETURN.
- Prevented horizontal scrolling in the Address Explorer when showing addresses from a custom path.
Device-specific changes
COLDCARD Mk4 (5.4.0)
- Fixed a bug with unstable detection of “card inserted/not inserted” status.
COLDCARD Q (1.3.0)
- Added QR scanning to import Seed XOR or backup passwords.
- Now supports sharing arbitrary files via (BB)QR file share.
- Create Airgapped is now compatible with BBQRs.
- Increased the default brightness when using battery power from 80% to 95%.
- Fixed issues related to the LCD, card reader, and the Seed XOR import process.
Where can I buy a genuine Coldcard hardware wallet in Vietnam?
If you are looking to buy an authentic COLDCARD hardware wallet that is absolutely secure and directly imported from Coinkite (Canada), visit BitcoinVN Shop – a leading and reputable distributor in Vietnam.
At BitcoinVN Shop, you will get:
- 1-hour free security consultation with an expert.
- A guarantee of a 100% authentic product, factory sealed, and never activated.
- Official warranty and dedicated technical support from a crypto-savvy team.
- Fast shipping, discreet, and secure packaging.
Don’t take risks with fake wallets or unverified products, you should only buy an authentic COLDCARD from an official reseller or Coldcard Factory to absolutely protect your cryptocurrency assets.
Conclusion
The COLDCARD Firmware updates 5.4.0 (Mk4) & 1.3.0 (Q) not only bring faster performance but also enhance security and usability. With features like smart Seed XOR management, multisig improvements, and BBQRs support, COLDCARD continues to confirm its position as one of the safest and most advanced hardware wallets available today.
Get your authentic Coldcard today
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