If you have problems with your PC locking or going to sleep, Caffeine will ensure that it stays awake. It works by simulating a key press once every 59 seconds, so your machine thinks youre still working at the keyboard and thus wont lock the screen or activate the screensaver. It uses the key for simulation as this is the least disruptive to most programs.to remembering many passwords, then this is the utility for you and much more secure than a note on the side of your monitor. Authentication Algorithm, Cipher Algorithm, MAC Address, RSSI, Channel Frequency, Channel Number, and more.