> Most of my security is based on OpenPGP keys stored on a Yubikey. In case the first one is broken/lost I've got another one. If both are lost there is a master copy on an offline computer that can be used to provision more Yubikeys.
Sounds like a good start, I'm going to have to do much more reading on this, I use my YubiKey just as a browser 2nd factor for a few 2FA apps.
In general I'm not sure how the YubiKey stores keys and till now I had no idea you can backup YubiKey
> The key unlocks access to passwords stored in pass. Because pass is based on git and gpg can be used to access SSH then the same yubikey is used to pull/push changes to pass and read encrypted passwords. On both the laptop and the phone (Password Store).
I'm not sure about storing the master keychein file in Git, but the workflow sounds interesting (I didn't fully understand the paragraph though).
> Data on the computer is LUKS-encrypted, unlocked by the Yubikey. Full backup of my laptop's SSD is done via btrfs send/receive to a raid1 array of 3 disks (raid1c3) on a regular intervals. A small subset if very important data (documents) is also backed up via restic to S3 and Backblaze.
This is next level and not of immediate interest to me. I was looking at something simpler like: https://cryptomator.org/
> In general I'm not sure how the YubiKey stores keys and till now I had no idea you can backup YubiKey
Well, actually you can't. You can backup keys if you create them in software and then just copy then to YubiKeys instead of moving them there. If you do that in an offline computer there is no risk of any malware stealing your keys in mid-process: https://news.ycombinator.com/item?id=21701488
Setting up Yubikey and OpenPGP took me some time reading all resources on the net but once done this is just working without any hiccups.
> I'm not sure about storing the master keychein file in Git, but the workflow sounds interesting (I didn't fully understand the paragraph though).
If it's encrypted there is no much harm to be done here. The only leaking info is that by default pass uses filenames based on domain names so if you have credentials for news.ycombinator.com they'd be in "news.ycombinator.com.gpg" file. For me a private repo for this use case is OK.
> This is next level and not of immediate interest to me. I was looking at something simpler like: https://cryptomator.org/
Yep, I do store external disk passwords in pass too. Udiskie can use a decryption command so when I put something like this in the config: `password_prompt: ["pass", "devices/{id_uuid}"]` it will grab the password from password store. This has an added benefit that I won't forget the password (it's stored alongside all others) and it's always valid (it's checked on each boot by udiskie).
What are you especially interested in? Then I can provide you with details.
Some random links I used:
- https://btrfs.wiki.kernel.org/index.php/Incremental_Backup
- https://blog.eleven-labs.com/en/openpgp-secret-keys-yubikey-...
- enable touch-to-use so even malicious software cannot access your passwords: https://developers.yubico.com/PGP/Card_edit.html#_yubikey_4_...
- https://www.passwordstore.org/
- https://play.google.com/store/apps/details?id=dev.msfjarvis....
- https://aur.archlinux.org/packages/mkinitcpio-gnupg/ (I'm thinking on replacing this with PKCS#11, more keys to manage but PKCS#11 is supported natively with systemd so one less dependency).
Hmm... maybe I should really document that...