TECH what program to use for file/folder encryption/decryption?

[s2k]

that doesn't requires admin rights and can run on a flash drive?

preferably free/open source

 

[Limp_Brisket]

truecrypt is what i always here recommended. i've never used it personally, but i think it meets all your requirements

 

[s2k]

truecrypt is what i always here recommended. i've never used it personally, but i think it meets all your requirements

truecrypt is sweet and i uses it, but it requires admin rights

 

[Ape Gone Insane]

MySecretFolder.