passphrase.io - Private Online Notepad app for iPhone and iPad

passphrase.io
Private Online Notepad

Enter any passphrase to get started. No account required.

• Private - all of your data is encrypted
• Safe - no cookies, tracking, or ads
• Simple - all you need is your passphrase
• Free - and open source

Use a long, complex passphrase that cant be guessed, and is never used in any song, literature, or media. Short and common passphrases lead to high visibility, and your notepad can be overwritten by anyone who stumbles upon it.

An easy way to get started is to combine your email address with two or more passwords.
For example: [email protected] FirstPassword SecondPassword

Alternately, you can click here to have a secure 8-word passphrase generated for you.

Your notepad is encrypted in your browser before it is sent to our server for storage. We have no way to see your passphrase or the contents of your notepad. If you use a strong passphrase, only you have access to your data.

By using passphrase.io, you are agreeing to our terms of service. Please keep in mind that your passphrase is case sensitive. If you forget your passphrase, there is no recovery process.

Technical Details:
Using client-side JavaScript, your passphrase is run through the memory-intensive scrypt key derivation function (N=218, r=8, p=1, dkLen=32) to generate a secret key. Your secret key is used to encrypt your notepad using AES256 encryption. The ciphertext (encrypted notepad) is sent along with a SHA256 hash of your secret key to the server for storage. To retrieve your notepad, the SHA256 hash is sent to the server, and the ciphertext is returned. The ciphertext is decrypted using your secret key, revealing your notepad.

Passphrase.io was inspired by the concept of the Bitcoin briainwallet, which allows you to store money in your brain by memorizing a passphrase.