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[EN] Escape Room 2017 Pro
Transcript of [EN] Escape Room 2017 Pro
NÉZZÜNK NÉHÁNY PÉLDÁT....
what is compression good for?
Why are we compressing?
Why should information be encrypted?
phishing = Data stealing
how to use the internet?
ALKOSS SAJÁT TITKOSÍRÁST !
What we are going to talk about today:
social networking sites
data takes up less space
less data goes through the network
Internet becomes faster!
high incidence letters
g: 1 db
n: 1 db
r: 2 DB
e: 3 DB
= 1 Bit (1 or 0)
g r e e n e r
with "ASCII" coding (1 letter is 1 BYte, so that is 8 bit):
7*8 bit =
1 0 0 1 1 1 0 1 0 0 1 1 0
with "huffman" coding:
+ the codeboard!
The longer the text is and the more repetitions are in it, the more it worth to compress this way!
polybos square: We can decode every letter with two numbers.
Every letter is coded by one sign
we move every letter by three signs
every letter belongs to a sign
only the adressee can read it ...
It protects other information (for ex. passwords)
except us, NO ONE ELSE can get it
Use two-factor Authentication!
the strong password:
at least 8-9 characters or more
there is a number in it
There are small and capital letters in it too
There is a symbol in it : ! ? #
Don't give your password to anyone!
use a password manager program!
How can be possible to create and memorise this many passwords?
One possible solution could be the using of a watchword.
Find out a sentence that you can remember easily. For ex.:
e cream consists of
Let's take some of the first letters of the words (optional) and substitute one or two characters for symbols!
website or e-mail that seems real
which address did we get the letter from?
Check the address of the website!
Don't give your personal data to strangers!
the PIN code of your debit card!
more advantages than risks!