Abstract: First participant information may be received that is associated with a set of participants that participate in an event. The set of participants may be distributed, based at least in part on distribution criteria and the first participant information, across a plurality of messaging groups, to form a first participant distribution, wherein each messaging group of the plurality of messaging groups has a respective participant subset of the set of participants, and wherein messages sent by participants within the respective participant subset are delivered only to other participants within the respective participant subset. During the event, second participant information may be received associated with the set of participants. Also during the event, the first participant distribution may be modified, based at least in part on the distribution criteria and the second participant information, to form a modified participant distribution.

Abstract: This disclosure is directed to computing services that provide secure network connections using public-private key-based security for Internet of Things (IoT) devices, such as voice devices, that may have more than a predefined set of users. Device certificates that authorize IoT devices to access a secure network, such as an enterprise network and/or services eternal to an enterprise network are provided. A setup system may cooperate with an IoT device and a subordinate CA to generate a device certificate that allows the IoT device to access a secure enterprise network and services outside of the secure enterprise network. The IoT device may generate a certificate signing request (CSR) which may be signed by a remote subordinate CA to generate the device certificate using a root certificate of an enterprise CA. Systems are also disclosed that renew certificates for the IoT devices prior to their expiration.