{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Week 4 Lecture Notes

Week 4 Lecture Notes - January 28 Lecture 10 Announcements...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
January 28: Lecture 10 Announcements Finish reading Chapter 2 if you have not done so yet Begin reading Chapter 6 *Big keywords reduce multiple occurrences of certain group of letters grouped together. One-time Pad Ciphers : hard to do because you need to travel to the other person and give them the key before-hand so they can read the ciphertext Book Cipher : encode a secret message where the letter encoded is the first letter of each word and the words are numbered from 1 on in like a newspaper or book and the ciphertext is just the numbers that represent the word that has that specific number in the article; each letter could also be numbered in the text instead of each word EX : 110, 73, 24, 807, 65, 86 (word in the article) A, R, E, Y, O, U (first letter of that wrd) Computers Binary #’s 0’s and 1’s (~“bits”) Base 10 : we make numbers using only 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Base 2 : what computers use: 0, 1 ~ 0, 1, 10, 11, 100, 101… Base 10 : 734 7 x 10 2 , 3 x 10 1 , 4 x 10 0 = 700 + 30 + 4 = 734 Base 2 : 110 1 x 2 2 , 1 x 2 1 , 1 x 2 0 = 4 + 2 + 0 =
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern