Which of the following developments significantly challenges traditional signature-based security defenses in the modern cyber threat environment?

### Why this is right - **Aggressive malware, including ransomware that can spread through networks**: the lesson describes network-based ransomware worms and destructive malware. - **Malware that changes its characteristics to evade detection**: changing characteristics can make signature-based detection more difficult. - **Less-protected connected devices**: some connected devices may not have the same security protections as other systems. - **Cloud services and remote work arrangements that require security attention**: both change where systems are hosted or accessed and must be considered in security planning. ### The concept Threat conditions evolve with technology and attacker methods. Organizations need to review security across devices, hosting arrangements, and work locations rather than assuming traditional boundaries cover every risk. ### Terms - **Malware**: Software designed to perform harmful or unauthorized actions. - **Ransomware**: Malware that can deny access to data or systems and demand payment. - **Signature-based detection**: Detecting threats by comparing them with known identifying patterns. ### Remember New technologies and changing malware can alter what defenses need to address.