Coinkite, the company behind hardware cold card wallets, has announced two new powerful tools aimed at enhancing wallet protection and flexibility: ColdCard Cosign (CCC) and KeyTeleport.
The solutions, announced on April 17th, seek to provide a robust alternative to users who use Bitcoin to prioritize operational autonomy and security, adding multifilmers and privacy and support features. Coldcard is one of the most popular and respected dedicated wallets on the market. The only cryptoactive supported by this wallet is Bitcoin (BTC).
The first addition to ColdCard is Cosign. It’s a tool Designed to facilitate wallet management in Multifirmas formatmechanisms that require multiple private keys to approve transactions, increased security against robberies and errors.
As reported by Cryptonotics, wallet Coldcards can integrate multifilmer functions by connecting them to software wallets such as Electrum, and previously did not own that capacity natively.
With CCC, cold cards can natively participate in multifilmer configurations, such as the 2-DE-3 scheme, where two of the three keys are required to approve the move of the funds.
ColdCards can act as an automated cosarium by applying pre-defined spending policies. Regarding this policy, Coinkite said: “You cannot review or modify a CCC fee policy once it has been established. No policy violations have been explained.”
This cost policy includes the following restrictions: Speed limit (period transaction), maximum amount, previously approved destination address, and two-factor authentication via the mobile application (RFC 6238).
Also, according to Coinkite, if the transaction exceeds the established limit, Another joint (third key) intervention is requiredadds additional control layers without relying on centralized servers. Users with previous Multifirma wallets can also import into ColdCard and use the Cosign function. Therefore, the company will clarify after the wallet.
Keyteoport, the second most important addition to the wallet cold card, addresses a different issue. Secure transfer of sensitive information between ColdCard devices, especially Model Q.
According to Coinkite, this tool is permitted “Send seeds, secure notes, passwords, PSBT files (partially signed transactions), and even full backups From one ColdCard to another using a QR code or NFC communication.
This process is especially useful in scenarios where users need to share important data without exposing them to secure channels such as video calls or instant messaging chat.
For example, users can clone a cold card by sending a full backup to another Q device that does not have a seed configured using a QR code. The process works as follows:
The recipient will display a QR (simple) code and a numeric code to the sender. The sender responds with a larger BBQR and an 8-character password.
Coinkite, creator of Condcard.
Meanwhile, the process of sending partially signed transactions via ColdCard to another user works like this:
Both are complemented by recent improvements to cold card firmware. Includes optimization and error correction.
Among the shared improvements, there is a 10% increase in large file loads per USB, visualizations on the large screen of Q models, and the ability to ignore PSB files already signed in virtual disk mode.
The fix addresses issues such as interface occlusion during USB communication failures, errors in visualization of derived routes, and incorrect completion of transactions such as partial signatures of external entries.
