Data Leakage

Data leakage refers to the unauthorized transmission or exposure of sensitive information from within an organization to an external destination or recipient. It can occur intentionally or unintentionally, often leading to security breaches, data theft, or compliance violations.

How It Works

Data leakage can happen through various channels, including email, <a href="https://www.ituonline.com/it-glossary/?letter=C&pagenum=3#term-cloud-storage" class="itu-glossary-inline-link">cloud storage, removable media, or malicious insider actions. It often involves the misuse of authorized access or exploitation of vulnerabilities in security controls. Techniques such as data exfiltration, where data is covertly transferred outside the organization, are common methods. Organisations implement data loss prevention (DLP) tools, encryption, and strict access controls to monitor and prevent such leaks.

Common Use Cases

• An employee accidentally sends sensitive client information via personal email.
• Malicious insiders intentionally copy confidential data to external devices or servers.
• Unsecured cloud storage leads to unintentional exposure of proprietary information.
• Phishing attacks trick employees into revealing login credentials, enabling data theft.
• Vulnerabilities in security systems allow hackers to extract data remotely.

Why It Matters

Data leakage poses significant risks to an organisation's reputation, legal standing, and financial health. For IT professionals and security practitioners, understanding data leakage is essential for implementing effective data protection strategies and ensuring compliance with data privacy regulations. Certification candidates focusing on cybersecurity, information security, or risk management must be familiar with data leakage concepts to design, assess, and enforce security controls that prevent sensitive information from leaving the organisation without authorisation.