Locks a message so it can only be opened after a chosen future time.
Capsule Temporelle
Verrouillez un message pour le futur. Chiffrement temporel utilisant l'aleatoire public du reseau drand — vos secrets restent locaux et ne se deverrouillent que lorsque le reseau atteint l'heure choisie.
Details de timing avances
Heure locale : —
Creating a reveal that becomes decryptable later without trusting one person to guard the key.
Offline storage where you cannot depend on outside network availability.
Cet outil contacte le reseau public drand uniquement pour recuperer des balises d'aleatoire. Votre message et vos cles ne quittent jamais votre navigateur.
Comprendre
Maitrisez le modele mental avant de faire confiance au resultat.
Un contexte court et pratique qui explique a quoi sert l'outil, comment il fonctionne et ou les erreurs courantes se produisent.
In plain English
Time Capsule lets you encrypt now and unlock later. Instead of waiting for a person to reveal the key, the unlock depends on future public randomness that does not exist yet.
How it works
This tool uses the drand randomness network. Your message is locked to a future drand beacon round, and once that round arrives, the public beacon can be used to derive the decryption material.
Encrypt now, unlock when the future beacon arrives
Your message is tied to a future public randomness round, not to a password handoff by another person.
Where you'd use it
- Publishing a message or prediction that should become readable only later.
- Building timed reveals for games, research, or public commitments.
- Sharing a secret that should unlock at the same time for everyone.
Common mistake
People sometimes think drand is storing their secret. It is not. drand only provides future public randomness; your encrypted message still needs to be preserved separately.
History / fun fact
The strange part of timelock encryption is that the unlock value does not exist when you press encrypt. You are binding your message to a future event that the network has not produced yet.
Security note
Timelock encryption depends on the availability and integrity of the public randomness network. It is best for delayed release, not for situations where fully offline recovery is required.
Deeper look
What drand actually is
drand is a distributed randomness network run by multiple independent participants. Together they generate public randomness beacons at regular intervals.
Why no single operator can unlock early
The beacon is collectively generated. That means no one operator should be able to produce the future beacon value alone before the scheduled round arrives.