This textbook provides an all-in-one approach for learning about hardware security of cryptographic systems. It gives the necessary background on mathematics that is used for the construction of symmetric and public-key cryptosystems. Then, it introduces the most commonly used encryption algorithms that can be found on a wide variety of embedded devices to provide confidentiality, integrity, and authenticity of the messages/data. Finally, it provides theoretical and practical details on the two most common attack methods in hardware security - side-channel attacks, and fault injection attacks, together with the protection methods used against both. Starts from the basics and does not require prior knowledge of cryptography or mathematical background Enables readers to implement symmetric block ciphers and RSA with an emphasis on hardware security Covers the classical as well as state-of-the-art fault attacks and side-channel attacks.