XKEYCHAINX LABS
Coldcard / Public disclosure

Donjon laser PIN recovery

PIN-protection material could be recovered.

Source date: 2020-05-18Reviewed: 11 October 2026

Affected scope

Mk2 / ATECC508A

What the attack requires

Physical possession and specialist laser laboratory.

Response & remediation

What changed

Hardware-generation change; see vendor response.

What this finding establishes

Do not transfer this exact Mk2 finding to Mk3 or current models.