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Works Cited

http://users.telenet.be/d.rijmenants/en/onetimepad.htm

YOFPVG

Decipher the cipher above

Shift 1:5

Shift 2:7

Shift 3:1

Shift 4:11

Shift 5:2

Shift 6:3

One-Time Pad Cipher

Pros And Cons

Pros: Hard for people who are trying to break your code if they dont have the code book

Very realiable

Cons: Takes some time to decipher a long message because there is a shift for every single letter of the message

If someone gets the code book they can intercept the message and read your messages

Paper one-time pads

  • Very limited use due to practical and logistical issues
  • Widely used by foreign service communicators until the 1980s
  • Code books went with these paper one-time pads, one code bok could contain thousands of words and entire phrases

Origins of One Time Pad

  • Started to be used in 1882
  • Frank Miller created this in one of his code books
  • His code book contains 14,000 words and phrases
  • This dissappeared, only to be discovered in archives in 2011
  • In 1917, Gilbert Vernam developed a system to encrypt teletype TTY communications
  • Very closely resembles Miller's ideas but highly unlikely he borrowed Miller's ideas because he had a electromechanical system completely different from Miller's pen and paper algorithm

Very Difficult to Decode

  • If you don't have the code book it could be very difficult for you to read the message.
  • You have to do 26 times however many letters there are and the number you will get is how many combination's there are
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