Patent ID: 7065214
Filing Date: 2006-06-20
Classification: G06F,G11B,H04L

Abstract:
1. A data receiving apparatus for decrypting data received from other equipment using said apparatus′ own key and information also received from said other equipment, said apparatus comprising: a signal receiving means for receiving a signal from a partner apparatus; a text decrypting means for decrypting an encrypted text received by said signal receiving means; and a signal transmitting means for transmitting a signal to a partner apparatus, wherein: said signal receiving means receives an ID requesting signal, a 1st encrypted text and a 3rd encrypted text; said text decrypting means: generates a 1st random number by decrypting said 1st encrypted text; generates a 2nd random number; generates a 2nd encrypted text by encrypting said 1st random number and 2nd random number with a license key; generates a 3rd random number and a session key by decrypting said 3rd encrypted text with license key; compares said 2nd random number with said 3rd random number included in said 3rd encrypted text received by said signal receiving means; and discard said session key only if a result of comparison satisfies a predetermined condition; and said signal transmitting means transmits an ID and said 2nd encrypted text.