Data breach：Wikipedia

A data breach, also known as data leakage, is the unauthorized exposure, disclosure, or loss of personal information….

A data breach, also known as data leakage, is the unauthorized exposure, disclosure, or loss of personal information.

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1. What Is a Data Breach? | IBM

# What is a data breach? ## What is a data breach? A data breach is any security incident in which unauthorized parties access sensitive or confidential information, including personal data (Social Security numbers, bank account numbers, healthcare data) and corporate data (customer records, intellectual property, financial information). According to IBM’s *Cost of a Data Breach 2025* report, the global average cost of a data breach is USD 4.44 million. According to the *Cost of a Data Breach* *2025* report, stolen or compromised credentials is one of the top five most common initial attack vectors, accounting for 10% of data breaches and taking up to 186 days to identify. In 2017, hackers breached the credit reporting agency Equifax and accessed the personal data of more than 143 million Americans. Organizations that extensively integrate artificial intelligence (AI) and automation into security operations resolve breaches 80 days faster than those that don’t, according to the *Cost of a Data Breach 2025* report.

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2. Data Breaches – National Association of Attorneys General

National Association of Attorneys General. A data breach can be defined as the unlawful and unauthorized acquisition of personal information that compromises the security, confidentiality, or integrity of personal information. What is considered personal information depends on state law but typically includes an individual’s first name (or initial) and last name plus one or more of the following:. These laws generally require organizations to notify individuals in the case of a data breach involving certain personal identifying information. When determining whether to pursue a data breach matter, attorneys general may consider several criteria:. The severity and scope of a data breach is an important component attorneys general must consider when pursuing a data breach case. Following a successful action against a company in violation of data breach laws, attorneys general may pursue different remedies:. As the nonpartisan national forum for America’s state and territory attorneys general and their staff, NAAG provides collaboration, insight, and expertise to empower and champion America’s attorneys general.

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3. Data Breach – Internet Crime Complaint Center (IC3)

An official website of the United States government. A **.gov** website belongs to an official government organization in the United States. ) or **https://** means you’ve safely connected to the .gov website. # Data Breach. A data breach is an intrusion into an organization’s system, network, or database, by an outside or internal entity, resulting in unauthorized access to confidential or secured information. ## Tips to prepare for a data breach. ## What to do in case of a data breach. Unless you are instructed to forensically preserve compromised systems, they should be reimaged as soon as possible to prevent attackers from using them as part of a botnet or a foothold into your network. #### File a Complaint. File a detailed complaint with www.ic3.gov. Prior to filing a complaint with the IC3, please read the following information regarding terms and conditions. I understand any contact or investigation regarding any complaint I file on this website is initiated at the discretion of the agency receiving the complaint information.

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4. What is a Data Breach and How to Prevent It? – Fortinet

It can be the consequence of an accidental event or intentional action to steal information from an individual or organization. For example, an employee could accidentally expose sensitive information or they could purposely steal company data and share it with—or sell it to—a third party. Whatever the root cause of a data breach, the stolen information can help cyber criminals make a profit by selling the data or using it as part of a wider attack. A data breach can be caused by an outside attacker, who targets an organization or several organizations for specific types of data, or by people within an organization. Data breaches can be the result of a deliberate attack, an unintentional error or oversight by an employee, or flaws and vulnerabilities in an organization’s infrastructure. An insider attack is a data breach caused by an employee leaking information to a third party.

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