Electronic seal, memory medium, advanced authentication system, mobile device, and vehicle start control apparatus

An advance authentication system, comprising a memory medium and an electronic seal,

• wherein the memory medium includes:
• a first advance authentication processing section for generating a random number and encrypting the generated random number based on a prescribed key, and
• a first input/output section for outputting the random number encrypted based on the prescribed key, and
• wherein the electronic seal includes:
• a second input/output section for receiving the random number encrypted based on the prescribed key, and
• a second advance authentication processing section for decrypting the encrypted and received random number based on a secret key related to the prescribed key and then encrypting the decrypted random number based on the secret key,
• wherein:
• the second input/output section outputs the random number encrypted based on the secret key,
• the first input/output section receives the random number encrypted based on the secret key,
• the first advance authentication processing section decrypts the random number, encrypted based on the secret key, based on the prescribed key, and compares the generated random number and the random number decrypted based on the prescribed key, and
• the memory medium and the electronic seal perform mutual data communication to perform advance authentication processing.

A mobile device including an electronic seal, wherein the electronic seal includes:

• an input/output section for receiving a random number encrypted based on a prescribed key;
• and
• an advance authentication processing section for decrypting the encrypted and received random number based on a secret key related to the prescribed key and then encrypting the decrypted random number based on the secret key,
• wherein the input/output section outputs the encrypted random number encrypted based on the secret key.