Abstract: A method for identifying a cutscene in gameplay footage, the method comprising: receiving a first video signal and a second video signal each comprising a plurality of images; creating a first video fingerprint comprising a plurality of signatures, each signature of the plurality of signatures based on at least one image of the plurality of images in the first video signal; creating a second video fingerprint comprising a plurality of signatures, each signature of the plurality of signatures based on at least one image of the plurality of images in the second video signal; comparing the first video fingerprint with the second video fingerprint; and identifying a cutscene when at least a portion of the first video fingerprint has at least a threshold level of similarity with at least a portion of the second video fingerprint.

Abstract: A distributed client/server computer network wherein the identity of at least one complex image, selected from a plurality of complex images stored by a client, is transmitted to a remote server. The remote server then determines, from the identity of the or each image selected, whether the client is authorised to gain access, via the server, to a particular network resource. The network is thus efficient, as the complex images themselves do not need to be transmitted from the client to the server, and secure, as no authorization information is stored by the client.