Cryptography Questions

1. Cryptography and ciphers have been used as far back as 2000 B.C. in Egyptian hieroglyphics.


3. A Caesar Cipher is an example of a large class of ciphers known as substitution ciphers.

4. Random substitution is much more secure than a Caesar shift because all of the replacements are random rather than the shift which follows a pattern. Because of this the random substitution has around 4x10^26 different possibilities while the shift has only 25.

5. Frequency Analysis

6. According to the reading, a random substitution cipher looks easy to crack but is actually hard to crack.

7. I think it would take me about 5-10 minutes


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