YkeY help

The purpose of this app is to provide more security storing and sending text. It can be used to store passwords anywhere or to encrypt e-mail or chat conversations.


- Uses AES encryption a symmetric-key encryption standard adopted by the U.S. government.

- Works off-line, it doesn't need to be connected to a server, and it doesn't send any info to the server.

- Works on all tested browsers in Windows, Mac, Linux, iPhone and Android.

- It's an iPhone/iPod Touch html5 App. Just add it to the screen or bookmark it on the browser.

How to use

- First insert the encrypting/decrypting key. Please read security tips bellow on how to choose a key.

- To encrypt insert your text text in the plaintext box and press the encrypt button. Encrypted text will show on the cyphertext box bellow. To decrypt do the opposite operation.

- Use copy-paste functions to move plain and cypher text between Ykey and mail program, text editor or chat program. In some browsers the select button selects all text in the box.

- This app uses utf-8 character encoding, and it may not display + encode + decode text in other encodings properly.

Security tips

- Keys should have more than 10 chars, include capital letters, lower letters, numbers and punctuation (ie: Andr4!€es 4iTorus).

- Keys should be unique. Don't use the same key elsewhere.

- Keys should not be transmitted electronically or stored in a file in the computer.

- Some means to crack keys: bribes, blackmail, seduction, a trojan horse in your computer/phone, theft and Guantanamo-like prisions.

- For certain uses you should use an app that provides public-key encryption instead of an app (uses symmetric-key encryption).

Disclaimer and terms of use

- There aren't warranties on security, as the server that hosts this app can be cracked and the script modified to reveal keys. There might be a new flaw in the encryption formula as well.

- If a key can not decrypt a message properly it's your problem only. By using this free program you are accepting all the risks involved and you agree to use it without any warranty. If you don't agree with this terms don't use it.


- The JavaScript code used in this page is in public domain and the author is Jonh Walker. All css, html and images are licensed under Creative Commons Attribution + Share-a-like and the author is Osvaldo Gago.