- #Forensic examination of android mac address how to
- #Forensic examination of android mac address full
Unlike patterns passwords can be a real problem for the attacker as the number of variants grows tremendously. So, while the Pattern Lock is a number, Password Lock can contain characters, numbers, and special marks. Using pattern lock dictionary we can find out that it corresponds to 0×06 0×04 0×01 0×02 0×05 0×08 values, which means that we have a 752369 pattern. Then Android uses SHA-1 and places it in a gesture.key file.Įxample! Let’s say that a gesture.key file contains 0×82 0×79 0x0A 0xD0 0xAD 0圎B 0×07 0xAC 0x2A 0×78 0xAC 0×07 0×03 0x8B 0xC9 0x3A 0×26 0×69 0x1F 0×12 bytes value. In other words we have a 0×00 for the first point and 0×08 for the last one. Smartphone encrypts the pattern of 1234 not as a string ‘1234’, but as a sequence of bytes 0×00 0×01 0×02 0×03. There is still one small trick with Pattern lock. You can download this dictionary and then easily find hash that will recover the original pattern.
#Forensic examination of android mac address full
For example, it takes only several minutes to create a full dictionary for 895824 numbers from 1234 to 987654321. The best way here could be to have a dictionary to recover the pattern. To restore the code the attacker will need to create a table of sequences with hash strings. Since SHA1 is a one-way algorithm there is no reverse function to convert hash to original sequence. Lock sequence is encrypted with a SHA1 hashing algorithm. Pattern lock data is kept in a file named gesture.key and stored in the /data/system folder. This is only 0.1% of all possible 9-digit numbers. So finally we have only 895824 variants of patterns available in Android OS devices. Moreover, the user cannot move over one point several times, in other words digits cannot be the same. To make it even clearer let’s substitute points with digits just like on phone num pad to receive a numeric value for the pattern.Įven if it is a multidigit number it is still a number limited to the set of 9 digits. The minimum number of points in the pattern is 4, maximum 9. A user has 9 points to create a ‘unique’ pattern.
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It seems to be complicated, but actually it is not. Generally pattern lock is a set of gestures that phone user performs to unlock his smartphone when he needs to use it. And finally we’ll try to understand how these locks are related to forensic investigation process.
#Forensic examination of android mac address how to
Let’s see what Pattern Lock is, how to access, determine or even get rid of it? We’ll also speak about Password Lock Protection and find out what it has in common with Pattern Lock.