With fast growth in information technologies, as well as an increasing number of mobile and wireless devices and services, the need to address vulnerabilities has been highly prioritized by many large corporations, as well as small and medium companies. The value of financial data in an accounting information system is extremely high. Thus, cybersecurity has become a critical concern in managing accounting information systems. Accounting information systems (AIS) aim to support all accounting functions and activities, including financial reporting, auditing, taxation, and management accounting. The AIS is a core knowledge area for accounting professionals and is a critical requirement for accounting practice. This book provides the essential knowledge for the accounting professional to stay ahead of the technology curve. This includes the accounting information system’s characteristics, accounting cycles, and accounting processes; reviews different types of information system designs and architectures; and discusses cyber security, vulnerabilities, cyber crime, cyber-attacks, and defense strategies.