Data encryption is a reliable cybersecurity measure. It converts sensitive information into a non-readable language that only the intended recipient can decode the message. It is an essential component of digital transformation as it helps to protect the security of information stored on or transmitted through computers or networks like the Internet. It ensures integrity and authenticity to ensure that the data isn’t altered or altered during transmission or storage.

Encrypting data is the process of changing original information into an encrypted format that can only be read by the person receiving it using a password or key. In most instances, the recipient is able to translate the encrypted data back to its original form. Modern encryption techniques use algorithms to convert the original data into ciphertext. This is accomplished with a variety of methods and algorithms, including transposition and substitution techniques. The Caesar cipher, named after Caesar, the Roman Emperor Julius Caesar, is an early example of a substitution cipher in which every letter is replaced with another one of a set number of positions along the alphabet (e.g., «E» is changed to «Y»).

Encryption can be required to ensure compliance with the rules set by a variety of institutions or standard bodies including the Fair Credit Reporting Act (FCRA) and other consumer protection laws. It is also an essential security measure for protecting sensitive information about clients, companies or patient data from cyberattacks. Retailers, for instance, must protect credit card information and shipping details when they transfer these data between networks or between systems. The encryption process can protect data that is at rest on computers and USB devices from being taken by hackers.