We must know that hackers can retrieve the password which we have used to safe them. These people use programs which can discover our password, searching it in text files, in which we have written it to don't forget it, or guessing the secret word. Safest algorithm can, with two passwords, protect every kind of file thought the safest algorithm in the world (AES 256), used by administration offices and military bureaus in U.S.A. Safest protects four times the same file with particular modifies of the two passwords typed by the user. This makes impossible the creation of applications able to discover the passwords of the protected file. Technical Details 4-time implementation of AES algorithm; 2 passwords selected by user; yigh speed, due to crashless technology; enhanced Microsoft framework technology. Version 1.6 may include unspecified updates, enhancements, or bug fixes.