Topic: Some of the well-known and best studied security models are listed below. Select a security model, research and submit a detailed post in the forum. 

a. Bell-LaPadula Confidentiality Model
b. Biba Integrity Model
c. Clark-Wison (well-formed transaction) Integrity Model
d. Brewer-Nash (Chinese Wall)

Book:  

Mark Ciampa, CompTIA® Security+ Guide to Network Security Fundamentals 7th Edition