USB memory + encryption
The Best Encrypted Flash Drives
http://www.pcworld.com/article/254816/the_best_encrypted_flash_drives.html
CRYPTO DRIVE - FIPS 197 ENCRYPTED USB
http://www.integralmemory.com/product/crypto-drive-fips-197-encrypted-usb
CRYPTO DUAL - FIPS 140-2 ENCRYPTED USB
http://www.integralmemory.com/product/crypto-dual-fips-140-2-encrypted-usb
DataTraveler
http://www.kingston.com/us/usb/encrypted_security