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Informational 20 Bitcoin

support random pin pad switch

Public commit record

What the developer wrote

Authored by ww3512687

50/100 · Thin
support random pin pad switch
✓ Descriptive subject✓ Names a concrete action or component✓ Names security-relevant behavior explicitly! No meaningful explanatory body
The short version

What changed, and why it matters

This commit adds a user-facing option to scramble the numeric PIN keypad layout on the Keystone 3 hardware wallet. When enabled, the digits appear in a random order each time, making it harder for someone watching or filming the screen to guess the PIN from finger positions. It is a security-hardening feature, not a fix for an active vulnerability, and it is off by default.

Recommended action

No immediate action required. Treat as a normal feature addition. If auditing, verify that the shuffle uses a cryptographically appropriate random source and that the setting cannot be toggled without authentication when the device is locked.

Security signals we found

01

Adds optional randomized PIN pad to mitigate shoulder-surfing / side-channel attacks

02

Randomization is opt-in and defaults to off

03

Uses existing Fisher-Yates shuffle on digit labels

04

Adds persistent setting stored in device settings JSON

05

Removes debug print statements from recovery-mode switch function

Risk score

Why this scored 20/100

Our methodology →
Potential impact 2/30
Exploitability 1/25
Stealth signal 1/15
Affected reach 3/15
Confidence 9/10
Evidence quality 4/5
Human-validated context

Community notes

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