Patent ID: 7996909
Filing Date: 2011-08-09
Classification: G06F,H04L

Abstract:
1. A transmitting apparatus for determining whether to authorize transmission of a predetermined content to a receiving apparatus based on a response time, said transmitting apparatus comprising: a hardware storage unit; a generation unit configured to generate authentication data based on a sequence number and store the generated authentication data in the hardware storage unit; a transmission unit configured to transmit plural measurement commands to the receiving apparatus, each measurement command including a first command including the sequence number and a second command including the stored authentication data generated by the generation unit; a reception unit configured to receive, from the receiving apparatus, first and second responses to, respectively, the first and second commands of a measurement command of the plural measurement commands, the second response including a response data based on the sequence number in the measurement command; a measuring unit configured to measure a response time of the second response to the second command; a first determination unit configured to determine whether the response time is less than a predetermined time; and a second determination unit configured to determine whether to authorize transmission of the predetermined content to the receiving apparatus based on the response time and the second response, wherein the sequence number is incremented in response to the second determination unit determining the response time is not less than the predetermined time, the response data includes a response generation time data indicating a time taken to generate the response data, the first determination unit subtracts the time taken to generate the response data from the response time to determine an actual response time, and the first determination unit determines whether the response time is less than the predetermined time by comparing the actual response time to the predetermined time.