Abstract
Cryptography is a solution to secure information. A data owned can be obtained as a security information so that data is needed to make data is still protected. A Folder is a container that allows the arrangement of data in order to remain neat and easy file search. XTEA (Extended Tiny Encryption Algorithm) is the encryption algorithms, can be used to secure data in folder to remain intact and safe. The research was designed and implemented an encryption-decryption application folder, which can hide and secure the files and subfolders in the folder. The results of tests indicating that the applications it developed not to change the contents of a file during the process as well as the encryption and decryption folder the results of the encryption joined in two files of different so they could not be identified by respondents.
