CipherOnce

Securing Your Data with Client-Side Encryption

At the heart of CipherOnce's security model is client-side encryption. This means all encryption and decryption of your secrets happens directly in your browser. We never receive your plaintext data, making our platform a true zero-knowledge service.

How Client-Side Encryption Works

The process is simple yet incredibly secure:

  1. You Create a Secret: You type your sensitive information into the form on our website.
  2. In-Browser Encryption: Before your data is sent, our JavaScript code generates a unique, cryptographically-strong encryption key. This key is used to encrypt your secret right there in your browser.
  3. Data Transmission: Only the encrypted data (ciphertext) is sent to our servers for storage. The encryption key is appended to the share link's URL fragment (#), which is never sent to the server.
  4. Recipient Access: When the recipient opens the link, their browser retrieves the encrypted data from our server. The key, present in the URL fragment, is then used by the browser to decrypt the message locally.
  5. Zero Server-Side Knowledge: At no point does our server have access to the encryption key or the unencrypted data. This guarantees that we, or any third party, cannot read your secrets.

The Benefits of This Approach

  • Maximum Privacy: Your data remains confidential from the moment you create it until the moment your recipient views it.
  • Trustless Security: You don't have to trust us. Our architecture is designed to be "trustless," meaning its security is based on verifiable cryptography, not on our promises.
  • End-to-End Protection: The encryption covers the entire lifecycle of your secret, from your device to your recipient's device, without any vulnerable points in between.
  • Resilience to Breaches: Even in the unlikely event of a server breach, your secrets remain secure as they are stored in an encrypted format that is impossible for us or attackers to decipher.

Share with Confidence

Client-side encryption is the gold standard for secure communication on the web. By using CipherOnce, you are leveraging this powerful technology to protect your most sensitive information.