In an era marked by digital interconnection, the importance of information security cannot be overstated. This chapter delves into the realm of information security, exploring its core principles, practices, and real-world applications. The chapter underscores the essence of information security in preserving confidentiality, integrity, and availability of sensitive data. It delves into security measures from both user and administrator perspectives. It explores encryption methodologies, revealing their inner workings and applications in securing data. In addition, it unravels the concepts of digital signatures and digital authentication. Inquiries on managing personal information while sending emails and using USB disks underscore the relevance of information security in everyday scenarios. The chapter empowers learners to embrace information security as an integral part of their digital lives, fostering a culture of vigilance and responsible digital citizenship.

Authors and Affiliations

1. Institute of Liberal Arts and Science, Kanazawa University, Kanazawa, Ishikawa, Japan

   Wei Weng

Corresponding author

Correspondence toWei Weng.

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