Reasonably Adequate Privacy
) is a concept from Tims Reasonably Adequate Concepts
. It's based on simple chemical stuff, that you can get in the nearest grocery store. It's low cost, requires little additional hardware, and is simple enough for even non-technical people to master.
This is mostly a funny enjoyable article, featuring comments such as "Beware of Snake Oil. It doesn't work and you have to find a snake. Lemon juice is better." This really is Data Obfuscation for the Masses.
More information can be found at: http://ruddick.com/tim/RAP/rap.html