Yesterday, i was thinking about my final project will be started on January 2009, perhaps up to June 2009. A great chance that drives me to learn more and more. The topics is around applied embedded cryptography, probably PSTN cryptophone .
A PSTN cryptophone is basically a device that interface telephone line. The device will encrypt and decrypt voice using RC4 stream cipher combined with Diffie Hellman Key Exchange algorithm. In addition i’m planning to use environment driven Pseudo Random Number Generator that combines generated random number and noise captured from environment .
I realized that PICmicro microcontrollers are no longer sufficient to fulfill my needs. I am supposed to use another microcontroller. A great candidate is AVR, a cool, fancy, fast, and single cycled machine. Far away before, i was motivated my self to grab the sense of using AVR by on hand practices, and it works, thanks God. Now i’m able to program AVR, i’m pursuing my dream to create my own hand made PSTN cryptophone, wish me luck .
The motivation of this idea comes from the needs of privacy over unsecure PSTN (Public Switched Telephone Number) which is secure enough and affodable for public use. PSTN is said to be unsecure, since it was easy to tap and intecept any conversation without any hard effort. Can you imagine if someone is passing his sensitive data through telephone line and a bad guy is tapping the wire and steal that informations? Of course, that could be a horrible things to be heard .
If possible, i will publish this project as a book and ebook. Yeah, i had a dream to publish a book which is cool, original, exceptional and high tech. Hopefully everything is running well .