Caelvan

Hope this is the right place for this. I am going to be doing some international travel for a couple of weeks and won't have access to my own computer/phone (feels kinda like cutting off an arm... ). Just wondering if there is any advice out there for using public computers. Ideally I'd like to have access to a few things (email for one) but using a public computer to access it always makes me nervous. Should I create a bootable USB to make sure I have a clean OS, which could introduce problems with accessing the network? Take my chances and access everything in the open and change all my passwords as soon as it is safe to do so? Or just go through withdrawal and say I don't really need access for two weeks.

I know developing a new algorithm is not really an option, just looking for some good algorithms already out there. Thanks for the suggestions, I'll look into them.

I am open to working with either, but the block code is more likely what I will be working with. It fits better since the data will be sent in blocks and not a continuous stream. I don't think that I will be able to do AES but I will definitely look into that, and DES is an option too. Thanks!

It is pretty deeply embedded. I currently have the system running with Freescale's RTOS MQX (not embedded Linux). I don't necessarily need to code it myself, but I would need the source so that I can compile it in. I have the system connecting to a server over a WLAN, and I don't want people to be able to read the data as it is being sent back to the server, or any commands from the server. The data isn't stored on the embedded system, I let the server take care of that, so I am not worried about encrypting the local data, just as I send the data out or receive it.

I don't think that True Crypt will work in this situation. Since it is an embedded system, I will need to code the algorithm myself. So I am looking for different algorithms I could code into a C program.

I was wondering if anybody knew of a good simple encryption scheme. I want to implement some encryption on an embedded system (so I can't use anything too complex) but is secure. TEA, XTEA, and XXTEA all look like decent choices but they have been broken in the past. So are there any ideas on another simple encryption scheme out there?