Key pairs and encrypting for others

Encrypts files so that only one specific person can open them – without exchanging a password. The recipient shares a public key (ECDH P-256); the sender encrypts with it; only the recipient’s private key opens the file.

Key pair

No key pair loaded. Create a new one or import a saved one.

Export private key (password-protected)

The private key is exported encrypted only (Argon2id, AES-256-GCM). Whoever has it and knows the password can decrypt for you or sign in your name. Otherwise the key pair exists only while this page is open.

Password for the export

Import private key

Key file (.trsr)

Key file password

Encrypt for someone

Recipient’s public key

File to encrypt (up to 256 MB)

Decrypt a received file

Encrypted file (.trsa)

Note: this does not prove who sent the file. That is what digital signatures are for.