Dynamically resolving recipients to retrieve public keys during send/receive

A tangible computer readable medium having instructions stored thereon that, if executed by a computing device, cause the computing device to perform operations comprising:

• storing messages designated to be encrypted during wireless communication on the mobile device during a period that the mobile device is unable to communicate with a server;
• upon the mobile device becoming able to communicate with the server,
• assessing messages stored on the mobile device, identifying stored messages designated to be encrypted during wireless communication, and identifying intended recipients for the stored messages designated to be encrypted during wireless communication, and
• generating a synchronization request for synchronizing between the mobile device and the server, the synchronization request comprising a request for public keys associated with identified recipients of a plurality of the stored messages.

A mobile device, comprising:

• a computing processor;
• and
• memory communicatively coupled with the computing processor, the memory comprising instructions executable on the computing processor to perform the following:
• storing a message on the mobile device during a period that the mobile device is unable to communicate with a server;
• associating the message with an identifier that indicates the message requires use of an encryption technique when transmitting;
• upon the mobile device becoming able to communicate with the server:
• assessing messages stored on the mobile device, identifying the stored message requiring use of an encryption technique when transmitting, and identifying an intended recipient for the stored message;
• generating a synchronization request for synchronizing between the mobile device and the server, the synchronization request comprising a request for a certificate associated with the identified recipient;
• transmitting the synchronization request;
• and
• receiving the certificate.