How to Protect Your Customers and Your Brand from Stolen Credential Misuse

How to Protect Your Customers and Your Brand from Stolen Credential Misuse During 2020 a number of Online Retailers have made headline news due to the media erroneously reporting that their customer Portals had been breached. These include Tesco Clubcard Members (https://www.techradar.com/uk/news/tesco-clubcard-holders-warned-of-major-security-issue) and most recently, Wiggle (https://cyclingindustry.news/security-breach-reported-on-wiggles-customer-accounts). In both these instances there was no exploitation of a cyber vulnerability. Threat Actors in all likelihood gained access to these Portals Accounts using a database of credentials stolen from other platforms or possibly via a Spear Phishing campaign.    The obvious questions here are: How was this possible? and How can this be prevented in the future? I prefer a shared responsibility model so let’s answer the above questions with this in mind:   How was this possible? Many subscribers have the same username (email address) and password for all online portals and web applications. Therefore, if one Portal account is compromised,