Patent ID: 7545934

Claim:
A security information packaging system comprising: an LSI including: a storing portion, for storing a first encrypted security information obtained by encrypting an final security information by an internal security information and a second encrypted security information obtained by encrypting the internal security information by using a converted security information; a seed generating portion, for storing a first constant containing address information and serving as a generation source of a conversion seed, a second constant serving as a generation source of a conversion seed for testing, and a third constant, and then outputting the conversion seed and the conversion seed for testing obtained by converting the third constant based on a one-way function using the first constant or the second constant in response to a test signal, a first one-way function circuit, for converting the conversion seed and the conversion seed for testing output from the seed generating portion by the first encrypted security information input from the storing portion to generate the converted security information or the converted security information for testing, a first decrypting circuit for decrypting the second encrypted security information input from the storing portion by using an output of the first one-way function circuit as a key, and a second decrypting circuit for decrypting the first encrypted security information input from the storing portion by using an output of the first decrypting circuit as a key, wherein the first constant and the second constant are separately selected and have no relationship with each other.