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Effective October 28, 2019 Duo Security will be transitioning to Cisco's Privacy Statement. View the Duo Privacy Data Sheet.

A network of devices connected to the internet and compromised by malware, often without its users’ knowledge, used to transmit malware or spam, or to launch attacks. When bad actors have control of hundreds or thousands of devices, they can carry out attacks like sending spam or flooding a network as a denial of service.