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In Part 3.1 of Section 1's Cryptography course, you're introduced to Cryptographic Tools. We begin with a clarifying review of the basic principles and essential elements of Cryptography -- confidentiality, integrity and authentication. The discussion incorporates additional elements such as privacy within confidentiality and non-repudiation, in addition to the main components of confidentiality, integrity, and authentication and further explores what the goal is to achieve them in Cryptography.