$SUNYUNRAN
Cooling DownSnapshot Window: 2026-08-01 09:30 UTC · ← Back to Crypto Overview
Social Momentum Summary
Total Engagement - Comments: 2, Retweets: 0, Likes: 1, Impressions: 54
Verbatim Community Citations & Social Evidence 1 source posts analyzed
cold storage always felt like the "safe" part. turns out a coldcard wallet had a bug sitting there since 2021. instead of using proper randomness, it leaned on things like chip serial numbers and clock data not exactly secret. not exactly random either nobody noticed for
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AI visual note: Two Coldcard hardware wallets—one labeled "Mk4" displaying version 1.5.0 (2024-05-19) with a QWERTY keyboard, and another labeled "Mk5" showing "Coldcard Wallet" on a numeric keypad—are shown to illustrate the post's point about a long-undetected randomness vulnerability in these cold storage devices.