Patent ID: 8452013

Claim:
A method implemented at a mobile device for providing digital security to a message transmitted from a mobile device, the method comprising: initiating the generation of a message to be transmitted, the message to be transmitted being associated with a previously received message, only a portion of the previously received message being stored at the mobile device; determining that digital security comprising one or more of encryption and a digital signature is to be applied to the message to be transmitted from the mobile device; after initiating the generation of the message to be transmitted and determining that digital security is to be applied to the message to be transmitted, the mobile device obtaining a complete copy of the previously received message by downloading the complete copy while the message to be transmitted is being generated; appending the previously received message thus obtained to the message to be transmitted; applying the digital security to the message to be transmitted comprising the appended previously received message; and transmitting the message to be transmitted from the mobile device.