Results 1 to 3 of 3

Math Help - Modular arithmetic help

  1. #1
    Newbie
    Joined
    Jul 2008
    Posts
    10

    Modular arithmetic help

    1. Equations satisfied by a and b

    R encrypted as V implies
    [ ]a + b ≡ [ ]mod 26

    W encrypted as O implies [ ]a + b ≡ [ ]mod 26

    2. Solutions for a and b


    The value of a is [ ] (give least residue, mod 26, for a)

    The value of b is [ ](give least residue, mod 26, for b)

    3. Decryption map x ≡ (cy+d) mod 26

    The value of c is [ ] (give least residue, mod 26, for c)

    The value of d is [ ](give least residue, mod 26, for d)


    I uploaded the encryption table.

    So far i have
    (i think)
    1)
    a)18a + 22b = ? mod 26
    b)23a + 17b = ? mod 26

    any ideas?
    Attached Files Attached Files
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Opalg's Avatar
    Joined
    Aug 2007
    From
    Leeds, UK
    Posts
    4,041
    Thanks
    7
    Quote Originally Posted by Ciachyou View Post
    So far i have
    (i think)
    1)
    a)18a + 22b = ? mod 26 Should be 18a + b = 22 (mod 26)
    b)23a + 17b = ? mod 26 and 23a + b = 17 (mod 26)
    ..
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jul 2008
    Posts
    10
    Thank you.
    Could i get some help with 2 please .
    I missed the last two weeks of college thanks to a virus.
    Last edited by Ciachyou; December 5th 2008 at 05:31 AM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Modular Arithmetic
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: March 28th 2010, 06:08 AM
  2. Arithmetic Modular help!!
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: March 24th 2010, 09:44 AM
  3. modular arithmetic
    Posted in the Discrete Math Forum
    Replies: 10
    Last Post: March 18th 2010, 09:33 AM
  4. modular arithmetic
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: March 2nd 2009, 01:17 PM
  5. Modular arithmetic
    Posted in the Number Theory Forum
    Replies: 2
    Last Post: December 13th 2008, 04:17 PM

Search Tags


/mathhelpforum @mathhelpforum