Herkos Drive

In development: it cannot be downloaded yet.

Herkos Drive keeps your files encrypted on Blossom servers and Nostr relays. Your key is your account: there is no sign-up, no password to reset and no company holding your files.

Every file is cut into blocks and encrypted on your device before it leaves it, with a key of its own for each version. The blocks go to Blossom servers run by independent operators, and each file gets copies on several of them, so that no single one can lose it. The list of your files and folders goes to the relays, sealed so that only you can read it.

What relays and servers see

Relays can see that your account has a Drive, how many files and folders it holds, how they nest and when each one changes, but not their names, types, sizes or dates. Servers see encrypted blocks, their size, the time and the address they come from, but not what they are nor which file they belong to. Free servers can limit, lose or close: Drive checks your copies and puts back the missing ones, but it is not "upload and forget". Deleting asks servers and relays to delete and destroys the file's key; a server that does not obey keeps only blocks nobody can open. Whoever has a link can open what it points to and keep what they download. If you lose your key and your recovery copy, nobody can open your files, not even Herkos.

Privacy policy · Your own Blossom server

Files

• Upload files and folders, also by dragging them on the desktop and the web
• An upload that is cut off goes on where it stopped
• Every block is checked when it comes back: a server that returns other bytes is skipped
• Folders as a list or a grid, move, rename, the bin, and the earlier versions of each file
• Preview of images and PDFs, with thumbnails encrypted apart
• Search by name runs on your device: what you look for never leaves it
• Save files to Drive from other Android apps

Copies and health

• Each file aims at three copies on two kinds of server
• A weekly check of the copies, by file and by folder, in green, amber, red or grey
• If a server of yours stops answering, Drive tells you and suggests another; it never changes your list on its own
• Space used, by server and in total
• A recovery copy with a password, which opens your Drive even without your key

Sharing

• A link that opens in any browser, with no account and no app, with a password and an expiry date if you want; the key goes after the # and never reaches a server
• Share with another Nostr account in an encrypted message only it can open: nobody sees who else you share with
• Take access back when you want: the folder gets new keys (what was already downloaded stays downloaded)

Yours to check and to change

• Free software under the MIT licence: Android, Windows, Linux and the web
• 25 languages
• No ads, no trackers, no statistics: the app sends nothing about you
• A PIN of its own, with biometrics or Windows Hello
• Sign in with your key (nsec) or with the signer app on your phone (NIP-55)
• Five relays and five servers by default, each with its operator and country in the privacy policy, or your own, even one at home

Not yet

• An external audit: the encryption has been reviewed inside the project, not yet by an independent firm.
• iPhone and Mac.
• Automatic backup of photos, a folder that syncs on the desktop, and video streaming.
• Uploading files to a folder that someone shared with you to write in.

Herkos comes from the Greek ἕρκος, "the fence that guards".