What is Encryption?
Encryption is the process of converting sensitive information into an unreadable format using a cryptographic key. Only authorised parties with the correct key can revert the data back to its original state. This technique is a fundamental requirement for securing personal data and ensuring data protection compliance across all digital operations.
Encryption transforms plain text into ciphertext. This ensures that if data is intercepted, it remains useless to unauthorised actors. It protects information stored on physical devices and data sent over networks. The GDPR highlights it as an appropriate technical measure for security.
Why is Encryption Essential for Data Protection Compliance?
Encryption is essential because it directly addresses the security principle of the GDPR. Article 32 requires organisations to implement appropriate technical measures to protect personal data from unauthorised access. Using these cryptographic methods reduces the legal risk and potential fines associated with a personal data breach.
Regulatory bodies view it as a gold standard for data protection. It provides a safe harbour in the event of hardware loss or theft. If encrypted data is lost, it may not count as a reportable breach. This is because the data remains unintelligible to anyone without the key. Multinational organisations use it to secure international data transfers.
How to Implement Encryption for Your Business?
Implementing encryption requires a systematic approach to identifying and securing sensitive assets. You must evaluate data at rest, such as database files, and data in transit, such as email communications. Using industry-standard algorithms ensures that your information security remains robust against modern cyber threats and evolving decryption techniques.
Start by auditing where your personal data is stored. Apply full-disk encryption to all company laptops and mobile devices. Ensure that your website uses HTTPS to protect user interactions. Set clear policies for managing and protecting cryptographic keys. Regularly update your software to use the latest security protocols.
Sources
- Information Commissioner’s Office (ICO) – Encryption Guidance: https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/security/encryption/
- National Cyber Security Centre (NCSC) – Using Encryption: https://www.ncsc.gov.uk/guidance/using-encryption-to-protect-data
- ISO – ISO/IEC 27001 Information Security Management: https://www.iso.org/isoiec-27001-information-security.html
- UK Government – Data Protection Act 2018: https://www.legislation.gov.uk/ukpga/2018/12/contents/enacted
