but say ladies and gentlemen of YouTube
you're watching CHM tech and today we're
going to be talking about unlock
patterns Android users have a few ways
they can unlock their screen should they
choose to have it locked in the first
place one rather interesting way of
doing this is by drawing a pattern on a
3x3 matrix consisting of nine contact
points now a lot of people who use this
mechanism keep it simple the common L
pattern is one of the easiest patterns
to get in a relatively small amount of
tribes if you're going to use this type
of lock screen and you want to have at
least a decent amount of security you
should probably go with a more complex
combination but how many combinations
are there now for those of you who are
here just for the number it's three
hundred and eighty nine thousand one
hundred twelve so if you click on the
video just for that and you don't really
care about but why in the house well
thanks for watching but if you're a bit
more curious here are some more
interesting facts the Android pattern
lock screen consists of nine contact
points arranged in a three by three
matrix
acceptable patterns are conditioned by
three main rules rule number one a
minimum of four contact points must be
connected and the maximum number is
obviously nine this implies that a
pattern can never be just a straight
line and that it will always have at
least one direction change rule number
two a contact point can only be used
once so once a particular point is
connected with another you cannot use it
again however you can cross over it to
get to an unused point but we'll get to
that after rule number three which
implies that an intermediate point
between two connected points must be
included in the pattern order unless it
was previously used for example the
l-shape pattern that you can see on
screen will always be in the order 1 4 7
8 despite the fact that 1 7 8 would
create the exact same pattern in this
particular situation point 4 has to be
included because it wasn't previously
used in other words a direct connection
between point 1 and point 7 isn't
possible due to the vacancy of the
intermediate point 4 however if point 4
was previously used a direct 1 2
connection would have been possible by
simply crossing the already occupied
intermediate point it's also possible to
cross over a previously created line for
example if you create this pattern in
the order to one three six nine under
the conditions created by these rules
you can create a total of three hundred
and eighty nine thousand one hundred and
twelve different patterns there's a
video you can find on YouTube that shows
all the possible combinations in 12
hours now the number of possible
patterns would be much bigger if it
wasn't for the restrictions implied by
the three rules still this type of lock
screen does offer a very decent amount
of combinations and there are some
really complicated ones you can create
but the more complicated they get the
harder they are to memorize research
shows that a lot of people use the
simplest of patterns which are
consequently the easiest to guess a
study done by Martha loggia a 2015
graduate at the Norwegian University of
Science and Technology showed how
predictable Android users can be when it
comes to choosing an unlock pattern
after analyzing almost four thousand
unlock patterns she found that forty
four percent of them started from the
top left contact point and that friendly
seven percent of all patterns started
from one of the four corners the average
number of contact points was five and
around ten percent of patterns were made
in the shape of a letter often
corresponding to the first initial of
the user for a user's loved one for more
stats regarding the topic be sure to
check out the links that will be listed
in the description but besides the
predictability of human behavior another
thing that can give away your unlock
pattern are smudges in a paper titled
smudge attacks on smartphone
touchscreens researchers from the
department of computer and information
science of the university of
pennsylvania show that this kind of
attack can result in full or partial
pattern recovery in many different
situations of course if your pattern is
set to be visible a potential attacker
may not even need to analyze any smudges
he or she may create an opportunity to
actually see your pattern and since so
many people use very simple ones
they're often much
year for an attachment to memorize than
a pin or password you can also find
online sources of information explaining
how to completely bypass the pattern
lock screen but then again you can find
methods for breaching all kinds of
security systems these days with that
said by no means does this info imply
that you should stop using unlock
pattern but it's definitely something to
keep in mind just use patterns with more
contact points make crossovers which
will make it much harder for someone to
figure out your pattern even if they're
looking over your shoulder have in mind
that you can totally turn off the
visibility of your pattern and don't
forget to wipe your screen thanks for
watching and as always stay strong
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