Using Zero Trust to Defend Against Every Stage of a Ransomware AttackUSING ZERO TRUST TO DEFEND AGAINST EVERY STAGE OF A RANSOMWARE ATTACK 2 ©2021 Zscaler, Inc. All rights reserved. Introduction Ransomware has been a threat for more than thirty years, but recently the nature of the battle has changed. 1 Within the last three months, ransomware has evolved more quickly than it’s done over the past half-decade. In today’s world, global businesses must assume that every ransomware attack is also a data breach, a fact that has profound implications for how we should design security architectures and network defenses. Far too many organizations continue to rely on legacy perimeter-based cybersecurity strategies. In this model, known as the castle-and-moat approach, defenses—which are

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