The Android pattern lock screen consists of 9 contact points arranged in a 3 x 3 matrix. Acceptable patterns are conditioned by three main rules: 1. A minimum of four contact points must be connected, and the maximum number is obviously 9. 2. A contact point can only be used once! 3. An intermediate point between two connected points, must be included in the pattern order, unless it was previously used! So how many different combinations are possible on the pattern lock screen? Under the conditions created by these rules you can create a total of 389,112 different patterns! Sources and references: - Quora: ‘’ Android (operating system): How many combinations does Android 9 point unlock have?’’ https://www.quora.com/Android-operating-system-How-many-combinations-does-Android-9-point-unlock-have - Department of Computer and Information Science – University of Pennsylvania: '' Smudge Attacks on Smartphone Touch Screens'' https://www.usenix.org/legacy/events/woot10/tech/full_papers/Aviv.pdf - Marte Løge: '' Tell me who you are and I will tell you your lock pattern'' https://media.defcon.org/DEF%20CON%2023/DEF%20CON%2023%20presentations/DEFCON-23-Marte-L0ge-I-will-Tell-you-your-Lock-Pattern-UPDATED.pdf - ArsTechnica: ‘’ New data uncovers the surprising predictability of Android lock patterns’’ https://arstechnica.com/security/2015/08/new-data-uncovers-the-surprising-predictability-of-android-lock-patterns/ - Sinustrom.info: ‘’ Android Unlock Pattern Security Analysis’’ https://sinustrom.info/2012/05/21/android-unlock-pattern-security-analysis/ - Adrián S (YouTube): ‘’ All combination of the android pattern.’’ https://www.youtube.com/watch?v=TyCAialVM2M _____________________________________ ► SUBSCRIBE: null ► FOLLOW ME ON TWITTER: https://twitter.com/chmtech ► GOOGLE +: https://plus.google.com/+ChannelHotmonkey/posts ______________________________________ Music: ''Floor Plan'', ‘’In The Hall Of The Mountain King’’, ‘’Ether’’, '’Moth’’(YouTube Audio Library)