Swap files are very fragile if you are using hibernation. For FDE I prefer LVM-over-LUKS and a dedicate partition
replyMacOS seems to have no problem with hibernating and it and its predecessor NeXT have been using swap files for over 30 years.
replyMacOS has no problem with hibernation because hardware and software are designed together: it uses TPM to manage swap encryption. I assume "BIOS" is also optimized to enable fast boot on sleep.
replyLinux can work with TPM but it's never as smooth. (Unless I guess you make it custom for your specific setup.)
I have FDE with keys in the TPM. It's pretty smooth bit required a one time additional step in Fedora. It's also probably not very secure, but my threat model is simple theft.
replyWhat's the benefit of using the TPM compared to a simple passphrase at boot, in that scenario?
replyHow so? It's a one time setup procedure of only a few steps to create a tiny "protective" ext4 (or whatever) partition at the front. Thereafter you configure crypttab to mount the partition via UUID with an offset and key. If you don't need to hibernate you can read the key from /dev/urandom.
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