System and method for controlling message attachment handling functions on a mobile device

摘要

A system and method for controlling message attachment handling functions on a mobile device is described herein. An attachment handling control can be set to identify one of a number of selected attachment handling control modes. Depending on the attachment handling control mode identified, a request for the attachment structure that includes a decrypted session key for an encrypted message received at the mobile device may or may not be automatically sent to a remote server. This may provide the user with increased control over the content of an encrypted message that the remote server may access when determining the attachment structure for a message.

主权项

1. A method for controlling message attachment handling functions on a mobile device, the method comprising:
providing an attachment handling control at the mobile device that is settable before a message is received from one or more remote servers, the attachment handling control for identifying one of at least a first mode, which permits the decrypted session key to be transmitted from the mobile device to the one or more remote servers upon receiving user input at the mobile device to transmit the decrypted session key, and a second mode, which prevents transmission of the decrypted session key from the mobile device; receiving at least a part of the message at the mobile device from the one or more remote servers, the message comprising encrypted message data, the part of the message comprising an encrypted session key associated with the message; determining which of the first and the second mode is identified by the attachment handling control; in response to the attachment handling control identifying the first mode, decrypting the encrypted session key to determine the decrypted session key and transmitting the decrypted session key to the one or more remote servers upon receiving the user input at the mobile device to transmit the decrypted session key; and in response to the attachment handling control identifying the second mode, preventing transmission of the decrypted session key to the one or more remote servers.