https://github.com/Coldcard/firmware/blob/master/docs/pin-entry.md
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## Cold Card Wallet PIN Setup: A Comprehensive Guide
This podcast episode, part of a series, provides an in-depth guide on setting up the various PIN options available on a Cold Card wallet, a device designed for secure cold storage of Bitcoin private keys. The guide emphasizes the critical importance of meticulous setup and secure storage of PIN codes, highlighting the irreversible nature of certain features. The Cold Card offers four distinct PIN options: a main pin for advanced settings, a secondary wallet pin for isolating funds, a duress wallet pin as a "honey pot" for potential compromise, and a "break me" pin for complete device destruction. The podcast stresses the need for unique, randomly generated PINs (even suggesting 9999999 as a potential clearing code) and the absolute necessity of writing them down offline in a secure location.
The setup process allows for a total of four active wallets, each accessible via a unique PIN and associated seed phrase. The Cold Card utilizes hashing and security algorithms to generate these phrases, creating multiple layers of protection. The podcast also discusses the importance of backups, recommending storing a secure SD card with backup files in case of device damage. In the event of a severe compromise, the recommended procedure involves generating a "Brickney" PIN to wipe the software and then physically destroying the secure element of the device to ensure complete data obliteration. The episode concludes with a giveaway of Cold Card wallets for open-source Bitcoin contributors, hosted by the World Crypto Network.
### Main Topics Discussed:
- PIN Options: Detailed explanation of the main pin, secondary wallet pin, duress wallet pin, and "break me" pin.
- Wallet Separation: How secondary wallets and rest pins allow for isolating funds and creating honeypots.
- Security Best Practices: Emphasis on writing down PINs, using unique PINs, generating random PINs, and offline setup.
- Device Protection: How the two-part pin system and duress wallet protect against device cloning.
- Backup Procedures: The importance of creating and securely storing backup files on SD cards.
- Device Destruction: The process of using a "Brickney" PIN to wipe the device and then physically destroying it.
- Open-Source Support: A Cold Card giveaway for contributors to open-source Bitcoin projects.
### Key Quotes:
- "There is absolutely no way to recover if you forgot the pin." (regarding the secondary wallet)
- "This is for really destroying everything on him literally a brick worthless piece of plastic." (regarding the "break me" pin)
- "If you catch me and if you put a five dollar range at my kneecaps right then I will brick the device so don't even try." (regarding the Brickney PIN and commitment to security)
- "This is for really destroying everything on him literally a brick worthless piece of plastic." (regarding the "break me" pin)
### People Mentioned:
- NVK: Involved in the Cold Card giveaway.
- Piers: Guest on the podcast.
- Bitcoin (Satoshi): Referenced in the context of protecting Bitcoin holdings.
- World Crypto Network: Hosting the Cold Card giveaway.
### Bitcoin Price:
- No specific Bitcoin prices were mentioned during the podcast.