<p>Some embodiments of the invention provide a method of verifying the integrity of digital content. At a source of the digital content, the method generates a signature Ê<n the digital content by applying a hashing function to s particular portion of the digits! content, where the particular portion is less than the earire digital content The method supplies fee signature and the digital comenÊ to a device. At the device, the method applies fee hashing feaion to fee particular portion of the digital content in order to verify the supplied signature, and thereby verifies the integrity of the supplied digital content.</p>
