Yes, you are correct - you need to store your grid and you can do that via a physical print, digital storage (including a native encryption option), and a recovery phrase for deterministic grids (12 words). The latter provides the means to storage the grids in the same way you would a normal seed phrase, but with an added layer of security against evil maid attack. The provides the ability to use a decoy too. Gridception is also an option, explained on our website.
Border Wallets is built using BIP39, and is designed to make memorising and transporting seed phrases across borders more secure and much easier for people.
Secure grid generation is provided by the Entropy Grid Generator tool, and the wallet(s) users create with it can be used in conjunction with existing backup methods if desired for when this solution needs to be invoked. We cover various use cases on our website, which also includes a full video demo which is easy to follow.
As for grid storage, there are several options for that:
1. Physical print
2. Digital storage
3. Encrypted digital storage (native encryption is a feature within the tool)
4. Recovery phrase for deterministic grids using 12 words - which provides an additional layer of security against evil maid (or border guard) attacks, as well as the option for decoys
Border Wallets offers a new way of storing, memorising and transporting Bitcoin seed phrases for people who:
- have difficulty/concerns with securely caching physical seed backups (evil maid attack)
- want to memorise their seed words but struggle to do so (e.g. the 15% of the global population who are dyslexic)
- want to carry their seed words with them at all times
- have limited access to trusted 3rd parties
- live in areas of conflict, war zones, etc.
- regularly travel or move around
- have no permanent fixed abode.
https://www.borderwallets.com/docs