Security through impermanence.
Conversation without residue.
An anonymous chat room that disappears the moment the conversation ends. Everything end to end encrypted, nothing logged, no accounts. An invite link is all you need. The rest happens inside your browser.
Entry is by invite link only, including the key after the #.
Why Hyōgen?
End to end encrypted
AES-256-GCM, the key is generated in your browser. The server only ever sees encrypted noise.
No accounts
No email. No password. No profile. All you need is a nickname, and even that stays local.
Self deleting
After 15 minutes of inactivity or once everyone has left, every trace is permanently erased.
Zero tracking
No tracking cookies, no third party analytics. Strictly necessary cookies only serve function and security. No IP address is kept in the chat data.
Instantly usable
An invite link is all it takes to join, and it is valid for exactly one person. No setup, no app, no account.
Key in the link
The decryption key only lives inside the URL fragment # and is never sent by your browser.
A secure conversation in three steps
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1
Receive an invitation
Entry is by invite link only. It carries the secret key that only your browser ever sees. Each link is valid for exactly one person and is spent afterwards.
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2
Open the link
Paste the link or open it directly, pick a nickname, done. Without the link, the chat does not exist for outsiders.
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3
Short. Clear. Self deleting.
Up to 10 people can chat together. Once the room is empty, or 15 minutes pass without a word, it is gone.
Privacy is not a feature.
It is the foundation.
Hyōgen is built so that even the operator could not read along, even if they wanted to. Everything is encrypted and decrypted exclusively inside your browser.
- AES-256-GCM: modern authenticated encryption.
- HKDF-SHA-256: clean key derivation.
- Web Crypto API: native in the browser, no JS crypto hacks.
- Strict CSP: no rogue scripts, no external sources.
- Nothing kept: messages only exist while the room is alive.