HomeGuidesSecurity GuidesSecurity GuidesPractical, plain-English help for the moments that matterWhat to do after a data breachYour details have turned up in a breach - here's exactly what to do, for individuals and for businesses, including the UK ICO 72-hour reporting rule.Read the guide Set up 2FA - and switch to passkeysTurn on stronger sign-in everywhere, and learn why passkeys are the phishing-proof upgrade that can replace passwords and 2FA altogether.Read the guide Infostealer infection: what to do nowWorried a device is infected? Spot the signs, take the right steps in the right order, and understand why changing a password alone isn't enough.Read the guide How to choose a dark web monitoring toolA vendor-neutral buyer's guide: the eight capabilities that decide whether a tool catches a compromise in time, plus a factual comparison of the established platforms.Read the guide CIS Controls v8.1: where monitoring fitsPreventive controls need evidence they're working. A control-by-control mapping of where dark web and infostealer monitoring supports a CIS v8.1 assessment.Read the guide More from DarkStrataWhat are infostealers?The background explainer: how infostealer malware works and why it has become the dominant credential-theft threat.Learn more VIP GuardianIdentity-anchored exposure monitoring for the executives and key people attackers target by name.Learn more Stolen data monitoringContinuous dark-web surveillance for your organisation's leaked credentials and stealer-log exposures.Learn more