Since the late 1990s, we've had PGP to exchange keys and encrypt messages or files. Now there’s TimeSeed—a simple, privacy-focused alternative that doesn’t rely on centralized servers or key pairs.
With TimeSeed, you only use pre-shared secrets. As long as you and your correspondent(s) know a shared timeseed (can even be public if there's absolutely no other option), you’ll be able to start communication and time different passwords with differentiators like a “pepper” password that you both know.
In TimeSeed, there’s no personal information involved—no email, fingerprint, ID, phone number, or hardware wallet. No central server or authority is required. It’s just pure cryptography, built for privacy. It’s also built for flexibility, using a two-layer setup:
TimeSeed + Pepper password → Derived (time-based) encryption password
TimeSeed is more than a basic encrypt/decrypt tool—it’s a deterministic password generator with built-in re-keying using pre-shared secrets.
From a single secret (the TimeSeed) and an optional pepper password, you can derive strong encryption keys on any device, online or offline.
It uses AES-GCM encryption with salting—verifiable, standard cryptography. All logic is contained in one single HTML file. No hidden components, no black boxes.
Generate a random 50-character string on the open-source site. This is your TimeSeed—the root of all your derived keys.
Timeseeds are only used on the Timeseed tab/section, never on the Lockit tab/section!
To separate contexts (by person, app, or situation), add a pepper password to the TimeSeed.
Best practice: share the TimeSeed securely, and exchange the pepper separately—over a call or in person.
You can even agree on a predefined list and only use specific “slots” from it for added secrecy.
In some rare cases, the timeseed can be shared publicly, and then the differentiator is the pepper-password (it's versatile, you can use it anyway you like)
Combine your TimeSeed + pepper to derive a 64-character encryption password.
It can be re-derived consistently by choosing a specific date—daily, monthly, or semi-annually.
You never use the TimeSeed directly for encryption—only the derived password.
This makes TimeSeed ideal for repeated use over time, where trust and secrecy are needed but identity and accounts are not.
Try it.
Rebuild it.
Trust it—because it’s open, auditable, and designed for a world where privacy matters.
TimeSeed:
R8prjIjMdg7mr2lL5a3NtYS3Jh43WqCHfbNxDIOtFDguFMAis2
Don't paste this in the "Lockit" section (that's for passwords). Place the timeseed above, in the Timeseed section!!!
Pepper password:
encrypt-everything
Derived encryption password (for 1st of January 2025):
35efd85af61e1f2853b4f2afa3e1edc2f3eeb4761e5da89e9ef7e52dbae4eb8f
Encrypted message:
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
Decrypted output:
"Test message created in June 2025 for ...."
This image was encoded with the derived encryption password above (35efd...).
You can download the encoded .tsx file, and test decoding it:
download tower_small.tsx
The full original image is shown below for reference.
The original file has the MD5 checksum:AF200B6269E2783CBE2C6D027F3F2E47 You'll get the exact same checksum when you decrypt the file as it's encrypted/decrypted in a lossless fashion. If you don't know how to check a file's checksum, here's an online MD5 hash checker.
See if you can decrypt the .tsx file to match the original image!
TimeSeed is free, open-source, and designed for a future where privacy is a human right.