Make the three keys

• 1 is 00. 2 is 01. 3 is 10. 4 is 11.
• 5 and 6 are not bits. Roll those dice again.
• Read the dice left to right, the same way every shake.
• Example: 4, 6, 1, 3, 2 becomes 11, skip the 6, then 00, 10, 01.
• Write only 0 and 1. You need at least 256 bits. More is fine. The extra bits are folded down.

1. 01 · Boot Tails. Networking Disabled. Copy the checked converter and the Ian Coleman page from the data USB to the Desktop.
2. 02 · Run the converter. Paste the bits. It prints 24 words. Word 24 is the check. Do not invent it. Do not “fix” it.
3. 03 · Open the Ian Coleman page in the offline browser. Entropy type: Binary. 24 words. Paste the same bits. The 24 words must match. If they differ, stop. Do not pick the prettier list.
4. 04 · Write the 24 words on the grid. Read them back out loud once.
5. 05 · Shut Tails down. Wait until the screen is dark. Then start the next key. Seed 2 is a new set of rolls. Seed 3 is a new set of rolls. Never continue a list from the previous boot.

$ cd ~/Desktop
$ python3 bip39_dice_converter.py

The 24 words are not 24 free choices. The last word carries a short check so a copying mistake is caught before you stamp metal. Use at least two of these. If they disagree, stop.

• Two tools, same bits, same 24 words. Converter, then the offline Ian Coleman page. Do not pick the prettier list.
• Let the wallet refuse a bad list. Sparrow or Electrum, networking off, will open a valid list and reject a broken one. If it will not open, do not change a word to force it.
• The math, if you want to see it. Twenty-four words are 264 bits. The first 256 are the dice. The last 8 are the check. Only word 24 can change to make that true. You do not choose it. The converter appends it after you have checked the file.