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Private key cryptography explained
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  1. #1
    Divided by zero and lived

    mojobojo is offline
    Join Date : Dec 2010
    Posts : 388
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    Private key cryptography explained

    I thought I would share this. I just watched it and saw it was a very good explanation.

    http://www.wimp.com/howencryption/

    EDIT: Just tried it, pretty cool math



    Code:
    Exponent and modulus 
    3 mod 17
    
    Private Numbers
    alice 10
    bob 15
    
    Calculate public numbers 
    3 ^ 10 mod 17 = 8
    3 ^ 15 mod 17 = 6
    
    Verify with public numbers
    8 ^ 15 = 35184372088832 mod 17 = 15
    6 ^ 10 = 60466176 mod 17 = 15
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  3. #2
    Hoshikage


    pureIso is offline
    Join Date : Jan 2011
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    Re: Private key cryptography explained

    I have to do this S88t for my math exam next week grrraaaaahh. It does my head in.
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  4. #3
    Administrator
    Rpg_Fan

    Sephiroth is offline
    Join Date : Nov 2010
    Location : Setagaya-ku, Tokyo, Japan
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    Re: Private key cryptography explained

    Code:
    Exponent and modulus 
    3 mod 17
    
    Private Numbers
    alice - 3
    bob - 9
    
    Calculate public numbers 
    (3^3) mod 17 = 10
    (3^9) mod 17 = 14
    
    Verify with public numbers
    10^9 = 1000000000 mod 17 = 7
    14^3 = 2744 mod 17 = 7
    Is this correct?
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  5. #4
    The Immortal God
    Rpg_Fan

    CloudStrife7x is offline
    Join Date : Dec 2010
    Location : Unknown
    Age : 29
    Posts : 18,760
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    Re: Private key cryptography explained

    Quote Originally Posted by Sephiroth View Post
    Code:
    Exponent and modulus 
    3 mod 17
    
    Private Numbers
    alice - 3
    bob - 9
    
    Calculate public numbers 
    (3^3) mod 17 = 10
    (3^9) mod 17 = 14
    
    Verify with public numbers
    10^9 = 1000000000 mod 17 = 7
    14^3 = 2744 mod 17 = 7
    Is this correct?
    yes that is correct like mine here :P

    Code:
    Exponent and modulus
    3 mod 17
    
    Private Numbers
    cloud - 24
    sephiroth - 15
    
    Calculate public numbers
    (3^24) mod 17 = 16
    (3^15) mod 17= 6
    
    Verify Public Numbers
    (16^15) = 1152921504606846976 mod 17 = 16
    (6^24) = 473838133821616896 mod 17 = 16
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  6. #5
    Wisdom Sold Seperately

    8Ball is offline
    Join Date : Dec 2010
    Location : UK
    Posts : 575
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    Re: Private key cryptography explained

    That was quite a fascinating watch, filled some cracks in my knowledge.
    Would i be right in thinking that quantum computing is going to be what can only be described as en mass rape? Because these measures are all based on time to crack which given the steady advances in technology seems somewhat... irresponsible.
    The math aspect doesn't seem particuarly hard but i can imagine becoming increasingly pissed off with it, as decent as I am with math it by no means brings me joy (making me use my head instead of a calculator in school is retarded)
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