Guides: Data Breaches and Cyber Security for Businesses

Clear answers on data breaches, stolen credentials and dark web risks – with concrete steps for your company.

• How to Check Whether Your Company Has Been Affected by a Data Breach
  How businesses can check whether their domain, email addresses or credentials appeared in a data breach – sources, steps and the limits of a breach check.
• What to Do After a Data Breach: Immediate Steps and GDPR Notification
  Found a data breach in your company? Immediate steps to limit damage – including the 72-hour notification deadline under GDPR Art. 33 and informing affected individuals.
• Infostealer Logs Explained: How Stolen Credentials Arise and What You Can Do
  What are infostealers and stealer logs? How do company credentials and session cookies end up in circulation, and which measures reduce the risk?
• Company Credentials Found on the Dark Web? Causes, Risks and Immediate Steps
  How company email addresses and passwords reach the dark web, which risks follow (credential stuffing, account takeover) and what to do immediately.
• Dark Web Monitoring for Business: What It Does and Where the Limits Are
  Dark web monitoring watches sources such as forums, marketplaces and paste sites for indications about your company. How it differs from a one-time breach check, plus benefits and limits.
• Cyber Intelligence Reports (CIQ360): What a Threat Landscape Report Contains
  What is a cyber intelligence report? Overview of CIQ360 light, CIQ360, CIQ360 plus and Cyber Threat Scan: contents, target groups and differences from the free data breach check.
• Reporting a data breach under GDPR Art. 33: step by step
  When a data breach must be reported, what the 72-hour deadline means, what the notification must contain and how to document it – with a checklist for businesses.
• Data breach check tools compared: Have I Been Pwned and alternatives for businesses
  Which data breach checks exist, what businesses should look for when choosing one, and when Have I Been Pwned, a domain check or monitoring is the right choice.
• Penetration test or data breach check: what is the difference?
  A penetration test and a data breach check answer different questions. Here is what each does, how they differ and when you need which.
• Free security check for small businesses: what you can test yourself
  Seven points small businesses can check without specialist knowledge: data breach check, multi-factor authentication, updates, backups, email protection and more.