7-Zip: Encryption merits
Background: TrueCrypt requires admin privileges on the host machine, even in Traveler mode. Some slick program I assembled using GPG and 7za does not seem to work for me anymore, and I cannot figure out why. So that leaves me, I think, with 7-Zip's encryption feature if I want to protect files on my USB and to use them in Windows machines with limited user privileges. Besides, 7-Zip is on my USB, so I may as well not load another program if it's not necessary.