COLDCARD RNG incident the public record, collected and explained
Informational only, and this site never asks for your seed words. details

Informational only. This is an open source collection of what others have published about the incident, together with an explanation of it. It is not financial, security or legal advice, and not a substitute for professional advice about your own situation. It is not affiliated with, endorsed by, or speaking for Coinkite. Material is attributed and quoted as published; where sources disagree their scenarios are kept separate with their assumptions rather than reconciled into one answer. Everything is meant to be checked against the linked evidence rather than taken on trust. Act on your own judgement about a particular situation. Editorial standards and corrections.

Do not disclose recovery material to a website, form, message or support account. This site never asks for it, and contributions containing recovery words or private keys are not accepted.

r/Bitcoin: common mistakes when generating a 24-word BIP39 seed with dice

reddit-dice-seed-mistakes

https://www.reddit.com/r/Bitcoin/comments/1vhu1e7/how_easy_is_it_to_make_a_serious_mistake_when/

Latest reviewed change

source content difference between and

The thread gained a single emoji reaction comment.

seen +8 -0 full history below
 Celsius of course!!
 
 *continues licking window of bus*
+
+comment: p2kl1ar
+parent: t1_p2fl2dz
+author: TechnologyGrouchy679
+created_utc: 1786241165

First lines only. The complete diff is in the timeline below.

Organisation
reddit
Evidence role
Community discussion
Published
not established
Source changes
2
Detected differences
2
Unreviewed
0
Copies held
3

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 .

  1. source content difference between and Current source content +8 -0

    The thread gained a single emoji reaction comment.

    seen · Captured here 6,929 chars
    What changed from the previous capture 8 lines
     Celsius of course!!
     
     *continues licking window of bus*
    +
    +comment: p2kl1ar
    +parent: t1_p2fl2dz
    +author: TechnologyGrouchy679
    +created_utc: 1786241165
    +edited: false
    +body:
    +馃槀
    
    Extracted text as captured
    post: 1vhu1e7
    author: Skinny_Human
    created_utc: 1786088493
    title: How easy is it to make a serious mistake when generate your own 24-word BIP39 seed, even if follow proper instructions?
    body:
    Recent events have made me reluctant to rely entirely on hardware-wallet entropy, so I鈥檓 going to use five precision casino dice instead.
    
    For those who have done it, what are the most common ways people get it wrong and what advice do you have for someone doing it for the first time?!
    
    EDIT: Sorry for the typos I wasn鈥檛 wearing my glasses!! 
    
    comment: p281fax
    parent: t3_1vhu1e7
    author: Jayrovers86
    created_utc: 1786088851
    edited: false
    body:
    Well thank fuck they are precision dice and not just regular dice. Phew!
    
    comment: p282ei2
    parent: t1_p281fax
    author: Effective_Savings769
    created_utc: 1786089331
    edited: false
    body:
    precision dice is a good call but the real trap is the checksum word, not the dice part. most people dont realize the last word isnt fully random and if you just roll all 24 words you'll get an invalid seed like half the time
    
    comment: p28377m
    parent: t3_1vhu1e7
    author: Background-Air-Red
    created_utc: 1786089727
    edited: false
    body:
    Hardest part isn't the dice, it's not messing up when you copy the words to paper. Double check every single word against the BIP39 list
    
    comment: p283pyq
    parent: t3_1vhu1e7
    author: PoeCollector
    created_utc: 1786089986
    edited: 1786090246

    Excerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.

  2. source content difference between and source content +18 -0

    The thread gained a short joke exchange about the temperature scale used during seed generation.

    seen · Captured here 6,816 chars
    What changed from the previous capture 18 lines
     These recent hacks are happening because the attacker knows the _exact algorithm_ that was used to create a very, very, very narrow range of possible SPECIFIC sequences, NOT because anyone didn't roll their dice right.
     
     I sympathize with anyone who has any form of spectrum disorder that's causing this kind of hyper-fixation, but exactly how you roll any given dice absolutely will not result in any degree of "insufficient entropy" that would make your phrase any more meaningfully vulnerable to attack. 
    +
    +comment: p2fkmo4
    +parent: t1_p28bx4k
    +author: TechnologyGrouchy679
    +created_utc: 1786181975
    +edited: false
    +body:
    +in Celsius or Fahrenheit?
    +
    +comment: p2fl2dz
    +parent: t1_p2fkmo4
    +author: Skinny_Human
    +created_utc: 1786182202
    +edited: false
    +body:
    +Celsius of course!!
    +
    +*continues licking window of bus*
    
    Extracted text as captured
    post: 1vhu1e7
    author: Skinny_Human
    created_utc: 1786088493
    title: How easy is it to make a serious mistake when generate your own 24-word BIP39 seed, even if follow proper instructions?
    body:
    Recent events have made me reluctant to rely entirely on hardware-wallet entropy, so I鈥檓 going to use five precision casino dice instead.
    
    For those who have done it, what are the most common ways people get it wrong and what advice do you have for someone doing it for the first time?!
    
    EDIT: Sorry for the typos I wasn鈥檛 wearing my glasses!! 
    
    comment: p281fax
    parent: t3_1vhu1e7
    author: Jayrovers86
    created_utc: 1786088851
    edited: false
    body:
    Well thank fuck they are precision dice and not just regular dice. Phew!
    
    comment: p282ei2
    parent: t1_p281fax
    author: Effective_Savings769
    created_utc: 1786089331
    edited: false
    body:
    precision dice is a good call but the real trap is the checksum word, not the dice part. most people dont realize the last word isnt fully random and if you just roll all 24 words you'll get an invalid seed like half the time
    
    comment: p28377m
    parent: t3_1vhu1e7
    author: Background-Air-Red
    created_utc: 1786089727
    edited: false
    body:
    Hardest part isn't the dice, it's not messing up when you copy the words to paper. Double check every single word against the BIP39 list
    
    comment: p283pyq
    parent: t3_1vhu1e7
    author: PoeCollector
    created_utc: 1786089986
    edited: 1786090246

    Excerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.

  3. Earliest copy held
    seen · Captured here 6,523 chars
    Extracted text as captured
    post: 1vhu1e7
    author: Skinny_Human
    created_utc: 1786088493
    title: How easy is it to make a serious mistake when generate your own 24-word BIP39 seed, even if follow proper instructions?
    body:
    Recent events have made me reluctant to rely entirely on hardware-wallet entropy, so I鈥檓 going to use five precision casino dice instead.
    
    For those who have done it, what are the most common ways people get it wrong and what advice do you have for someone doing it for the first time?!
    
    EDIT: Sorry for the typos I wasn鈥檛 wearing my glasses!! 
    
    comment: p281fax
    parent: t3_1vhu1e7
    author: Jayrovers86
    created_utc: 1786088851
    edited: false
    body:
    Well thank fuck they are precision dice and not just regular dice. Phew!
    
    comment: p282ei2
    parent: t1_p281fax
    author: Effective_Savings769
    created_utc: 1786089331
    edited: false
    body:
    precision dice is a good call but the real trap is the checksum word, not the dice part. most people dont realize the last word isnt fully random and if you just roll all 24 words you'll get an invalid seed like half the time
    
    comment: p28377m
    parent: t3_1vhu1e7
    author: Background-Air-Red
    created_utc: 1786089727
    edited: false
    body:
    Hardest part isn't the dice, it's not messing up when you copy the words to paper. Double check every single word against the BIP39 list
    
    comment: p283pyq
    parent: t3_1vhu1e7
    author: PoeCollector
    created_utc: 1786089986
    edited: 1786090246

    Excerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.

How to check this yourself

The excerpts and plain unified diffs above show the text this project held and how it changed. To verify a quotation, compare it against the page itself or against the Internet Archive's copies, which are independent of this project.

Complete captures are held offline rather than mirrored here, so this page shows diffs and excerpts. If a quotation is ever disputed, the full copy can be produced. Ask.