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COLDCARD Docs
User Guide
1. Quickstart! Start Here!
2. Guide For Bitcoin Beginners
3. Hardware Features
4. BIP-39 Passphrase
5. COLDCARD Middle Ground Guide
6. COLDCARD Paranoid Guide
7. COLDCARD Ultra Quick Guide
8. Compatible Software Wallets and Tools
9. Derivation Paths and Accounts
10. Encrypted Backups
11. HSM Mode and CKBunker
12. How to Clone or Migrate a COLDCARD
13. Message Signing
14. Migrate from Ledger or Trezor to COLDCARD
15. Recovery Cards Downloads
16. Sending and Receiving Bitcoin for Beginners
17. Upgrade Firmware
18. microSD Card Related
19. Settings Menu
20. Address Explorer
21. BIP-85 Passwords
22. BSMS (BIP-129)
23. Descriptor Export
24. Descriptors & Multisig
25. Ephemeral Seed
26. NFC Tools
27. Advanced Menu
28. Importing or Creating Private Keys
29. Multisig Features
30. Command Line Tools
31. Downloads
32. Version History
33. Verifying Dice Roll Math
34. Paper Wallets
35. Export Deterministic Entropy (BIP-85)
36. Seed XOR
37. Technical Terms Glossary
38. Trouble Shooting
39. Table of Contents
Other Features and Tools
Advanced Topics
Specifications
Guides by the Community
How To Videos
Glossary
Hardware Wallet Comparison
New in Mk4
Docs Menu
COLDCARD Docs
User Guide
Other Features and Tools
Advanced Topics
Specifications
Guides by the Community
How To Videos
Glossary
Hardware Wallet Comparison
New in Mk4
/
Advanced Topics
HSM Mode and the CKBunker to permit automated signing and remote access.
You can view and download the source code on Github.
Long and detailed discussion of PIN codes and the security element that holds the real secrets.
Details of our encrypted backup files.
Documented limitations, policy choices, and TODO items.
Importing seed words into Electrum for funds recovery and other tips.
How to use with Bitcoin Core.
How developers can modify Coldcard to extend it.
Memory map highlights.
Security Design and Architecture
Mk4 Secure Elements
Mk4 Security Model
Coldcard NFC
Coldcard PIN Design and Operation
More Advance Documentation and Design Information
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