r/coldcard: claimed COLDCARD entropy warning from October 2023
reddit-entropy-warning-october-2023
https://www.reddit.com/r/coldcard/comments/1vg95g7/coldcard_entropy_warning_in_october_2023/
Latest reviewed change
source content difference between and
The post body, which linked a 2023 CryptoGuide video about an insecure COLDCARD Mk4 dice-seed warning, was removed and now reads [removed].
created_utc: 1785940594
title: Coldcard Entropy Warning in October 2023
body:
-I think this YouTuber, CryptoGuide, is underrated.
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-Cracking Unsafe Bitcoin Wallets + Coldcard Mk4 Warning (Insecure Dice Based Seeds & Private Keys)
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-[https://www.youtube.com/watch?v=oj\_W3xOlt6U](https://www.youtube.com/watch?v=oj_W3xOlt6U)
First lines only. The complete diff is in the timeline below.
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Every check is recorded, including checks that found no text change. A detected edit is therefore bounded between two checks. The publisher's exact save time is not observable from this record. Last checked .
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Held captures
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The post body, which linked a 2023 CryptoGuide video about an insecure COLDCARD Mk4 dice-seed warning, was removed and now reads [removed].
Recovered from the Internet Archive rather than captured by this project. The row records that third-party provenance separately from captures made by this project.
What changed from the previous capture 18 lines
created_utc: 1785940594 title: Coldcard Entropy Warning in October 2023 body: -I think this YouTuber, CryptoGuide, is underrated. - -Cracking Unsafe Bitcoin Wallets + Coldcard Mk4 Warning (Insecure Dice Based Seeds & Private Keys) - -[https://www.youtube.com/watch?v=oj\_W3xOlt6U](https://www.youtube.com/watch?v=oj_W3xOlt6U) - -Picking a Good BIP39 Passphrase (25th Word) or avoiding a bad one. For Trezor, Ledger, & Keepkey - -[https://www.youtube.com/watch?v=nhjq\_1J0EbU](https://www.youtube.com/watch?v=nhjq_1J0EbU) - - - -It looks like ColdCard had another entropy vulnerability - at one time the Mk4 allowed users to apply only 1 dice roll when selecting their 12 words (although it warned users), until this was changed with a firmware update. In the video it looks like this problem lead to bitcoin theft. - - - - +[removed] comment: p1vb2r1 parent: t3_1vg95g7Extracted text as captured
post: 1vg95g7 author: Crypto-Moony created_utc: 1785940594 title: Coldcard Entropy Warning in October 2023 body: [removed] comment: p1vb2r1 parent: t3_1vg95g7 author: JumpProfessional3372 created_utc: 1785942407 edited: false body: I remember this about the wallet letting you use very low entropy. comment: p1vcd3i parent: t3_1vg95g7 author: na3than created_utc: 1785942740 edited: false body: Designing the firmware to allow the user to use very low entropy is VERY DIFFERENT from designing the firmware to use conplex entropy and leading the user to believe the firmware uses complex entropy but breaking that design through a software defect. comment: p1vj8jc parent: t3_1vg95g7 author: Charming-Designer944 created_utc: 1785944470 edited: false body: The dice roll weakness created weak seed phrases that could easily be brute forced. Shares many properties with seeds generated with the RNG flaw, but a quite different cause. comment: p1w7w6e parent: t3_1vg95g7 author: Far-Department-4196 created_utc: 1785950556 edited: false body: So what are we saying here? If a guy has a mk4 with the new firmware , generates a new seed , with 50 dice rolls. You’re saying that this entropy is not safe anymore?Excerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.
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Recovered from the Internet Archive rather than captured by this project. The row records that third-party provenance separately from captures made by this project.
What changed from the previous capture 0 lines
Extracted text as captured
post: 1vg95g7 author: Crypto-Moony created_utc: 1785940594 title: Coldcard Entropy Warning in October 2023 body: I think this YouTuber, CryptoGuide, is underrated. Cracking Unsafe Bitcoin Wallets + Coldcard Mk4 Warning (Insecure Dice Based Seeds & Private Keys) [https://www.youtube.com/watch?v=oj\_W3xOlt6U](https://www.youtube.com/watch?v=oj_W3xOlt6U) Picking a Good BIP39 Passphrase (25th Word) or avoiding a bad one. For Trezor, Ledger, & Keepkey [https://www.youtube.com/watch?v=nhjq\_1J0EbU](https://www.youtube.com/watch?v=nhjq_1J0EbU) It looks like ColdCard had another entropy vulnerability - at one time the Mk4 allowed users to apply only 1 dice roll when selecting their 12 words (although it warned users), until this was changed with a firmware update. In the video it looks like this problem lead to bitcoin theft. comment: p1vb2r1 parent: t3_1vg95g7 author: JumpProfessional3372 created_utc: 1785942407 edited: false body: I remember this about the wallet letting you use very low entropy. comment: p1vcd3i parent: t3_1vg95g7 author: na3than created_utc: 1785942740 edited: false body: Designing the firmware to allow the user to use very low entropy is VERY DIFFERENT from designing the firmware to use conplex entropy and leading the user to believe the firmware uses complex entropy but breaking that design through a software defect. comment: p1vj8jcExcerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.
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