ParanoiaBox

[profdc9]

Hello,

I have created a standalone cryptography device that one can compose messages with, encrypt them, decrypt them, and read them all without a PC.  It uses a bluepill and performs AES256 encryption as well as EC25519 cryptography.  The device connects to a television and a PS/2 keyboard.  It encrypts and decrypts to separate SD cards.  Some pictures are below.  You can get the full details at

http://www.github.com/profdc9/ParanoiaBox

It is an experiment to see how small an attack surface a self-contained cryptography device can have.  I have attached photos of literal screenshots of the television.

Enjoy!

Dan

[DenCraw]

hi Dan...
I am interested in sending commands and receive the responses to and from a Siemens s7 1200 plc. using UDP
I have already done all the protocol in simple text in UDP.
In order to provide "some" sort of security I was planing to make my own cipher but with keeloq method,... again some sort.
I am very overwhelmed by the info about encryption...

I would like to have a simple encryptor, having the seed in both terminals (pc and s7), but the NEW password is sent in the last message.
if the message is lost or corrupted or the device is having an attack,.. well i am lost here. perhaps, the PC must send a new message with a master password. and reset the cycle of passwords.. i don't know..

I want to thank you for this project and i will continue in my search.
If you get my idea I will appreciate any insight.
Best regards.