Data encryption is a security technique that makes information unreadable to unauthorised individuals. Using an encryption algorithm, data is transformed into an unintelligible format that can only be decrypted with a specific key. This means that even if a cybercriminal manages to intercept or steal the data, they will not be able to use it without that key.
Encryption is used in many everyday situations, often without us even realising it. It protects communications between a web browser and a website (HTTPS), online payments, data stored on a computer, smartphone or USB drive, as well as information hosted in the cloud.
For businesses, encryption is an essential safeguard against data theft. For example, if a laptop is lost or stolen, the files stored on it will remain inaccessible if the drive is properly encrypted. Likewise, encryption helps secure sensitive information shared between employees, customers and partners.
It is important to understand that encryption does not replace other cybersecurity measures. A company should also protect access through multi-factor authentication (MFA), keep its systems up to date, perform regular backups and monitor its IT infrastructure. Encryption acts as an additional layer of protection, particularly when data leaves the company’s environment or is at risk of being intercepted.
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Today, encryption has become an essential security standard. By protecting the confidentiality of information, it reduces the risks associated with cyberattacks, lost devices and data breaches. It is also an important measure for meeting the requirements of regulations such as the GDPR and the NIS2 Directive, which require organisations to implement appropriate measures to protect the data they process.