Cryptography

CryptographyShort Description
Cryptography. Jim Carlson. Science Day. November 17, 2001 ….. CRYPTOGRAPHY PROBLEMS. The material in these notes, plus that in [Singh] …

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Cryptography
Jim Carlson
Science Day
November 17, 2001The Problem: For Alice to send a message
to Bob that only Bob can read. They have to
worry about Eve, who is a snoop.
?450 BC - 1977: Secret codes depend on
secrecy of the keyword
?1977 - ??: the RSA code (Rivest-Shamir-
Adelman): unbreakable even if the key
is known.
Public key codes (like RSA):
- Essential for internet commmerce.
- Depend on some beautiful mathematics …
… ap.1  1 mod p ….
1…

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