Boo Secret Encrypter
Hand Boo a secret without anyone seeing it in cleartext — not the network, not your chat history, not even the page you're looking at once you close this tab.
Encryption happens in this tab.
The math runs in your browser via WebCrypto. Nothing about your secret leaves the page.
Only this Boo can read it.
The matching private key lives in this deployment's vault. No other Boo, no other person, no operator with database access can decrypt the file.
Standards-only, no homegrown crypto.
RSA-OAEP-SHA256 wraps a single-use AES-256-GCM key, both via your browser vendor's WebCrypto. No third-party scripts, no analytics, no fonts, no network calls after this page loads.
Next step: drop the downloaded .boosecret file into a Slack DM
with Boo and say what you'd like done with it.
Verify Boo's public key
SHA-256 fingerprint (SPKI)
SHA256:+qBjsJuwYS6c6je+QF6hERuWUkNHQW3sahCN8H2zPfk
Full PEM
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuPPXos6GaHPh7KT24pBe yCtbSL+kvVBs5jm78aYz/Spxpc43ovJYKlaEuPEd17vIo4UuPegzxmL0zOOTlqWD yQpEEBEvkQGQ2FG6JgxozQjrQsJtajK0afnhvQhC1fdkRk0jothGKG0ukLqM6hn/ MzJohvTNTua5jjBLFL2wBduStlKivFOzugqZElRCmIrbb4FDPEDFs52z1vqKmTfQ 0RgfeZb2nmBZoxw/lLgR9KdQllbVYyg5Aqq3CNBz9s8ZlpB4Mg32cwvCwFyO66s0 1V4Gy8Sr6SRd1737P7DeB0n6zd9TrAgLKEBnNBD6otobS2J2XdHlLXc/XuXA2Mcl fZPygnNa7bFu20Q5Ujd0H8pTE1VZMbdIcMnRdOZDA65cn8+FCj0YCVbOA/ViCFOC pC6tJ8zWo2Z9kekgIjcxxorVZE5V9XwMVR77LY8cPnraq0z4Sq4X+LU8twgh8C1M ITwNhvguzSg0itDnLqBBScEpKd6h92YA/GBsn11rXm4jCPwm8LoDpe5PSG8h549I +Ux6kMapcjhUobv6tn6lkrpICN/3J7OZ9HUH+EegF2ovU4Ake2pIwtOMOkrL3cJh nQQtlIN4PeBqhO+PZVpF/sSQoG/+ANNLX39WWjw+xKWiytymSTvsum0WwRrumNsA BOf4DYoVTfYrpt4Ki+C9ShMCAwEAAQ== -----END PUBLIC KEY-----