<http://www.soepgarnaal.com/shrimp7/?p=42> 256-bit encryption for Twitter posts As i announced yesterday, the new version of shrimp7 (31) support compression for your Twitter, Facebook and Friendfeed posts. With that technique you will be able to post messages that are longer then 140 characters. When i implemented message compression i had the idea to implement a AES-256bit encryption method for shrimp7 version 32. I use the same principles as the compression method i use. After encryption Ibll add 2 characters in front of the string so applications could recognize compressed or encrypted messages. These applications can filter out this messages, or can offer a solution to decompress/decrypt the message. When a compressed or encrypted message is found by shrimp7 it will show a lock-icon. For encrypted messages there is a possibility to click on the lock-icon, fill in the key and read the original 12 billion $ message. The characters i use for compressed messages are . and ! , for example: .!test 4, shrimp7 coD rDsed tweets. How manyDharsDD& DD0in? ID-utf8D0orkD3gD5C$B8B C&B5B7.D theD0eaE er iD-badDlittlEE undEDD>mD WaE E fD> rE,n! WEwonD$D>E!E E<10D)D+D-nD" For AES encrypted messages i chose the . and ? , then a message could look like this: .?WsSMSoaGhoZFjHZzQzx7iOZ +GKmXXcyD hq0iEBExlReVG2f0ACO256i84cOC7QlxO/txTuRdkQwL +fBGZlcUQBQoDHLLm/3cFbEEW3ZU8I/CD63wfgpGbAx+eH9oPAmVyYv14Y= Using longer messages then 140 chars is not Twitters goal but there are cases that it will be very handy. The idea for encrypting messages is more easy: nobody can read the message unless they have the key to decrypt the message. Handling a key to the user who need to read the encrypted message is the most weakness in cipher/key encryption so be careful while crossing the dessert to deliver a key to your friend! Message encryption is not intended for use by criminals. There are certainly cases that encryption on networks like Twitter can be a life saver. To optimize encrypted messages shrimp7 also compress encrypted messages. The compression for encrypted messages works really bad, but winning 1 char is better then losing 1 characters. [demime 1.01d removed an attachment of type application/pgp-signature which had a name of signature.asc]