simple USB encryption

“From KASHU SYSTEM DESIGN: Information leakage becomes a social problem. Information leakage may be given a huge damage to a company or individual. So we need security software to protect our information (data, file). There is much security software for PC, but little security software for mobile device. USB Flash Security is security software for mobile device. It can help you to protect you mobile devices by encryption (AES256bit). AES encryption which is recognized by speedy and cipher strength of encryption algorithm has been adopted. Data will be encrypted automatically by writing in USB memory, and it will be decrypted automatically by reading from USB memory. About encryption of USB Flash Security, all of the information (file name, folder name, and data file.) in “Protected Area” is encrypted. So it can not be conjectured even find the file’ path. “Protected Area” is encrypted by key which is the password of [USB Flash Security]. So result of encryption will be changed by password. Anyone who does not know the password can not analyze the data.”

download: http://download.cnet.com/USB-Flash-Security/3000-2092_4-10946552.html
please note this software has a free trial which is efficient but only for 4gb flash drives.