Today’s reliance upon a mobile, connected world, has given rise to the cyber age. In parallel, the rapid evolution of cybercrime has driven the importance of cyber security in society.  However, cyber due diligence has been severely lacking in the Mergers & Acquisitions (M&A) process.  An unforeseen data breach during a merger or acquisition, could result in hundreds of millions of pounds being wiped from the deal, e.g. the £280 million reduction in the purchase price between Yahoo and Verizon Communications, in 2016.  Cyber Security in Mergers & Acquisitions answers the question “How do I assess the maturity of an organisation’s cyber security during the pre-deal phase, using security best practice?”.  This industry handbook is directed to professionals involved in M&A deals, as well as university students interested in M&A, private equity and cyber security. It adheres to cyber security best practice, and analyses key elements in the due diligence process, such as governance, risk management, supply chain assurance, regulatory compliance, cyber insurance, cyber threat intelligence, incident management, disaster recovery, and much more. Tumber is an award-winning and world record-breaking cyber security specialist, with over a decade's worth of experience in the industry. In this ground-breaking book, he provides the cyber solution for today's era of M&A deals, the CyberDD6 framework.