Great, but...

You should make it so that the finger print appears on the amount of space being covered.
My dad used his fingertip and a big fingerprint appeared which was wider than his finger tip, so yea that gave it away.
Also, let us change the "access granted" and "access denied" sounds; "Welcome Master!" really? Thats stupid.

TheLooongestNicknameThatTheiTunesStoreAndAppStoreHaveEverSeenAndNobodyWillTopMeIThinkThatillMaxItOut about Password* Add Photos & Video for iPhone, iPad and iPod Touch, v5.4