Simplify the following text for a Grade 12 native English-speaking person.
Original: In cryptography , confusion and diffusion are two properties of the operation of a secure cipher which were identified by Claude Shannon in his paper Communication Theory of Secrecy Systems , published in 1949 .
Simplified: Confusion and diffusion were identified by Claude Shannon in his paper , `` Communication Theory of Secrecy Systems '' published in 1949 .