Protocol for crossing borders with hardware wallets.

I've seeing few posts here about some dark places to hide your hardware wallets during cross border flights, etc... consider loosing / being confiscated all your belongings and still be able to recover your coins.

I'm software engineer, and I use following method to store some sensitive info for easy access even if I loose all my devices. AES256-encrypted DMG images are pretty cool and might be useful for temp. seed phrase storage.

Also you might want to research Steganography and secure memorable passwords.

So curious what you guys think about this mental exercise:

1. On a machine with no internet connection create an encrypted, writable DMG (use a Mac VM / Bootable ubuntu usb if you are extra paranoid )
2. Create memorable, but strong and long encryption key (password) for your DMG / image. This will be a weak link, so might get creative with it.Might use some combination of info on your ticket/etc that will be available to you after travel is done.Do not name the file MYCRYPTOKEYS.dmg
3. Write your seed in a text file and put it inside the image
4. Send it to your iCloud drive (or other cloud storage if you trust any) and log out. Best to use a "burner" cloud account, and not your usual one.
5. Reset your hardware wallets.
6. After you feel being safe again, immediately login to your cloud storage, restore hardware wallets from seed phrases and delete the image.
7. For extra paranoid: send your crypto to a new address.

It takes a decade to crack the encrypted DMG.

The reason it’s so slow is because your AES256-encrypted DMG uses 250,000 rounds of PBKDF2-HMAC-SHA-1 to generate the encryption key. The ludicrous round count makes it extremely computationally expensive, slowing down the HMAC-SHA1 process by a factor of 250,000.

If you suspect someone has a possession of the file, send the crypto to the new address long before it can be cracked.