A "data breach" refers to the unauthorized access and retrieval of sensitive, protected, or confidential information. In a cybersecurity context, this breach can involve personal data, financial information, or corporate secrets being compromised by hackers. Data breaches can lead to severe consequences, including financial loss, reputational damage, and legal ramifications for affected organizations. Effective measures to prevent data breaches include implementing strong security protocols, conducting regular audits, and using encryption technologies. Prompt detection and response to breaches are also crucial to mitigating damage and protecting stakeholders.