This document discusses information privacy and security. It begins by defining information privacy and outlining different types of information. It then discusses various laws and authorities related to privacy protection in different countries. Several privacy protocols, technologies, and algorithms are presented, along with methods for information security. Common threats to digital information are listed. The relationship between privacy and security is examined, noting that privacy cannot exist without security. Concerns regarding privacy in various contexts are raised and the conclusion reiterates the close link between privacy and security while underscoring common threats.