How 13 hardware wallets responded to Coldcard failure

A late‑July failure in a Coldcard device’s entropy system prompted public posts on X from 13 hardware wallet manufacturers. Companies posted information about device safety, seed migration and security options over the first days after the incident.

Bitkey (Block) and Blockstream Jade posted within hours, explaining why their devices were not affected. Bitkey published an independent technical analysis of its seedless wallet and advised users not to rush into new self‑custody setups, and later outlined its 2‑of‑3 multisig design. Blockstream described Jade’s multi‑source entropy generation and published a four‑step migration guide for Coldcard users. Ledger posted about 14 hours after the issue surfaced and followed with a technical explanation from its chief technology officer highlighting a certified true random number generator inside a secure element.

Open‑source vendors published technical breakdowns and audit notes to let users inspect designs. Passport Prime, Trezor, BitBox, Keystone and Blockstream emphasized verifiability and published details on how entropy is generated. More closed‑source firms such as Ledger, Tangem and Ngrave pointed to certifications, audits and architectural differences instead of releasing source code.

A subset of manufacturers provided hands‑on migration guidance or promoted multisignature setups. Foundation (Passport Prime), Bitkey, Ellipal, Jade, BitBox and Trezor offered actionable materials, including step‑by‑step migration checklists, entropy testing tools, and recommendations to add BIP‑39 passphrases or use dice for extra randomness. KeepKey posted a technical breakdown and linked to a post explaining who was at risk and why an all‑Coldcard multisig does not protect against this class of failure.

Follow‑up activity differed across teams. Trezor, Bitkey, BitBox and Blockstream continued to answer user questions and expand on technical details in the days after the initial posts. Ledger, Tangem, SafePal and Ngrave were less active in ongoing discussion. Ngrave highlighted an air‑gapped, multi‑part key generation process, while Ellipal promoted support for user‑generated seeds and offered an independent randomness check and a migration checklist.

Some vendors announced additional security measures. Passport Prime said it would add health monitoring to detect low‑entropy states and planned an entropy‑testing app for users. Trezor published technical notes on its entropy approach and disclosed that about 14,000 customers were affected by a shipping‑provider data breach. SafePal reported roughly 40,000 customers impacted by a separate data leak.

Manufacturers’ posts focused on how seeds are generated, available migration steps, and threats such as phishing. Several teams wrote about multisig options and newer multisig protocols like Miniscript and MuSig2. The public posts and technical notes from the 13 manufacturers are available on their X accounts and linked resources for users seeking device‑specific guidance.