Patent ID: 9608818
Date: 2017-03-28
CPC Classifications: H04L

Claim:
1. A cryptographic communication system including first to third semiconductor devices, wherein the third semiconductor device is configured to supply first correction data for correcting a first unique code to the first semiconductor device and supply second correction data for correcting a second unique code to the second semiconductor device, the first semiconductor device includes a first common key generation unit configured to generate a first common key based on the first unique code, which has a value unique to the first semiconductor device, and the first correction data supplied from the third semiconductor device, the second semiconductor device includes a second common key generation unit configured to generate a second common key based on the second unique code, which has a value unique to the second semiconductor device, and the second correction data supplied from the third semiconductor device, the first unique code includes one or more bits with a high error rate and one or more bits with a low error rate, the first correction data includes a first bit mask for masking the high error rate bits and an error correction code for correcting the low error rate bits, and the first common key generation unit is configured to: