information-security

Using a Single system() Call to Execute Multiple Commands in C

In an information security lab I'm working on, I've been tasked with executing multiple commands with a single call to "system()" (written in C, running on Fedora). What is the syntax that will allow me to execute more than command through system()? (The idea being you could execute arbitrary commands through a program running on a rem...

How could you encrypt user data so only they can decrypt it?

I was thinking about creating a Web app that would let people enter text (using SSL connection) and it would be encrypted before saving to the DB. The goal would be to have it so that only users could decrypt it. You could have the users enter the key along with their data, and enter it again when they want to see the data, and not stor...

How can I start an application on a different system remotely?

I've got a situation where i have one system running a master application that communicates with slave applets on other systems, problem is, i can't guarentee that the slave applets will be running, nor that an operator can physically utilize the system to start the applet (and I'm also assuming they don't know how to use Remote desktop,...