A messaging system in one embodiment includes a messaging app and a polling extension app. The polling extension app is configured to create data for a polling context that is displayed in a view hosted by the messaging app to allow voting by users selected for the poll and to update the polling context with the votes from the users. The messaging app launches the polling extension app, and the polling context is communicated between the polling extension app and the messaging app through an interprocess communication.

A change propagation command, in one embodiment, causes the creation of induced commands in order to propagate commands in a collaborative document creation process that involves at least two client systems and a server system. The change propagation command received on a client system causes the creation of induced commands to a local copy on that client system and also causes the creation of induced commands on the server system. The induced commands in one embodiment apply changes to any objects that were added after the original change propagation command was received.

Device and/or line event awareness and smart synchronization is described. In at least one example, a related device of a group of related devices may receive a communication notification representative of a communication event. Such communication notifications may enable event awareness for each of the devices in the group of related devices. In an example, the related device may compare data items (e.g., participants, timestamps, etc.) associated with the communication notification with data items associated with entries stored in a local data store. The entries may correspond to communication events associated with at least the related device. Based at least in part on comparing the data items, the related device may determine whether a new entry associated with the communication notification should be added to a local data store or the communication notification should be disregarded as a duplication.

A data transfer process can include multiple verification features usable by a “source” device to ensure that a “destination” device is authorized to receive a requested data object. The source device and destination device can communicate via a first communication channel (which can be on a wide-area network) to exchange public keys, then use the public keys to verify their identities and establish a secure session on a second communication channel (which can be a local channel). The data object can be transferred via the secure session. Prior to sending the data object, the source device can perform secondary verification operations (in addition to the key exchange) to confirm the identity of the second device and/or the locality of the connection on the second communication channel.

An email messaging system is provided that includes a first email message server, a second email message server and a distributed database system that stores a blockchain. The first email message server receives an email message from a first user system, and records a selected component of the received email message into a block of the blockchain. The selected component of the email message is added to the blockchain after validation by other participants in the blockchain. When the second email message server receives the email message from the first email message server, the second email message server can determine whether a component from the received email message matches the selected component that is stored in the block of the blockchain.

Provided is a method of synchronizing content directory service (CDS) objects of a universal plug and play (UPnP) media servers. The UPnP media servers manage information on synchronization objects and synchronization policy information, which reduces the role of a control point (CP) in performing synchronization, so that the synchronization speed is increased.

A method includes: generating profile data for users including a first user, the profile data related to contacts or persons used in messages to or from each user; generating, via a server platform, parameters corresponding to the profile data for ranking contacts or persons; and transmitting the parameters to client devices to allow each client device to determine ranks of contacts or persons in the profile data based on the parameters and a function that uses the parameters.

A method is provided for synchronous sharing of a document between a first and a second terminal. The method includes: transmission of a message to the second terminal comprising the coordinates of at least one contact point defined on the basis of the document to be shared; upon the opening of a viewing time window defined by the intersection of a first and of a second time window defined respectively for the first and the second terminal and each being bounded by the receipt, originating from the terminal, of a sharing agreement message triggered by an action on the at least one contact point and the receipt of an abandonment message triggered by the stopping of the action on the at least one contact point, of transmission of the document and of a command to display the document to the second terminal; and transmission of a command to delete the document upon the closing of the viewing time window.

One or more techniques and/or computing devices are provided for replicating virtual machine disk clones. For example, a first storage controller, hosting first storage, may have a synchronous replication relationship with a second storage controller hosting second storage. A virtual machine, within the first storage, may be specified as having synchronous replication protection. Accordingly, virtual machine disk clones of a virtual machine disk of the virtual machine may be replicated from the first storage to the second storage. For example, virtual machine disk clones may be synchronous replicated, replicated by a resync process invoked by a hypervisor agent, and/or stored and replicated from a clone backup directory.

One or more techniques and/or computing devices are provided for replicating virtual machine disk clones. For example, a first storage controller, hosting first storage, may have a synchronous replication relationship with a second storage controller hosting second storage. A virtual machine, within the first storage, may be specified as having synchronous replication protection. Accordingly, virtual machine disk clones of a virtual machine disk of the virtual machine may be replicated from the first storage to the second storage. For example, virtual machine disk clones may be synchronous replicated, replicated by a resync process invoked by a hypervisor agent, and/or stored and replicated from a clone backup directory.