Patent ID: 9083681
Filing Date: 2015-07-14
Classification: H04L

Abstract:
1. A content-transmitting apparatus, comprising: a storage device storing instructions; and at least one hardware processor coupled to the storage device, the at least one processor being configured to execute the instructions in order to: initiate a transmission, to a content-receiving apparatus, of content encrypted in accordance with a corresponding exchange key; determine, in response to the transmission, whether first key information associated with the content-receiving apparatus corresponds to second key information associated with the content-transmitting apparatus; modify a usability of at least a portion of the transmitted content at the content-transmitting apparatus, when the first key information corresponds to the second key information; when the first key information corresponds to the second key information, store resume data associated with the transmission within the storage device, the resume data comprising at least one of an identifier of the corresponding exchange key or third key information associated with the content-receiving apparatus; receive a confirmation message from the content-receiving apparatus; confirm that the content is usable at the content-receiving apparatus, based on at least the confirmation message; and in response to the received confirmation message, delete the resume data from the storage device, the at least one hardware processor is further configured to execute the set of instructions to: receive the first key information from the content-receiving apparatus; generate the second key information based on at least a key associated with the content-transmitting apparatus; generate the third key information by performing a predetermined operation on random number data received from the content-receiving apparatus; and transmit the third key information to the content-receiving apparatus.