Save Keys Undetectable 6.2 descriptions Save Keys Undetectable 6. 2 is an invisible key recorder that secretly logs every key typed into the keyboard. Other information such as window titles program names & paths & clipboard text can also be recorded. This new version has improved encryption for faster encoding/decoding of the log file. At the time of release on the first of January 2005 no known anti-spyware or anti-keylogger was able to detect Save Keys Undetectable 6. 2.