What's the alternative to typing in a LUKS password?
You can use TPM with secure boot to store the password. TPM checks that the firmware is the same and that the OS is signed by trusted (by _you_) keys, and if everything matches it makes the key available for reading by the OS.
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You can use TPM with secure boot to store the password. TPM checks that the firmware is the same and that the OS is signed by trusted (by _you_) keys, and if everything matches it makes the key available for reading by the OS.