The development of cryptography has resulted in a robust safeguard for all aspects of the digital transformation process. As the backbone of today’s security infrastructure, it ensures the integrity of communications, prevents the misuse of personally identifiable information (PII) and other private data, verifies the authenticity of individuals, keeps documents from being altered, and establishes trust between the servers. Using cryptography, you can verify not only the identity of the sender and the recipient but also the authenticity of the information’s source and final destination. Using the hashing algorithms and the message digests, which are discussed in detail in this book, cryptography ensures the authenticity of data. The recipient may rest easy knowing that the information they have received has not been altered with codes and digital keys used to verify its authenticity and the sender. Quantum computing allows for the development of data encryption techniques that are far more secure than current methods. Although there are several advantages of using quantum computers for cryptography, this technology may also be used by criminals to create new forms of ransomware that can crack older, more secure encryption protocols in a fraction of the time. Even if quantum computers are still a decade away, that timeline may be more optimistic than most people think. Soon, hackers may be able to use such quantum computers to launch far more sophisticated malware attacks. Despite its drawbacks, quantum computing will ultimately help make encryption safer for everyone.