CRYPTOGRAPHIC COMMUNICATION SYSTEM, SECURE ELEMENT, DEVICE, AND CRYPTOGRAPHIC COMMUNICATION METHOD

To provide a cryptographic communication system, secure element, device, and cryptographic communication method that do not require prior sharing of keys.SOLUTION: A secure element includes a secure element key generation unit that generates a secure element public key and a secure element private k...

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Bibliographic Details
Main Author ASANO MASANORI
Format Patent
LanguageEnglish
Japanese
Published 10.04.2024
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Summary:To provide a cryptographic communication system, secure element, device, and cryptographic communication method that do not require prior sharing of keys.SOLUTION: A secure element includes a secure element key generation unit that generates a secure element public key and a secure element private key, and a secure element output unit that outputs the generated secure element public key to a server. The server includes a server registration unit that obtains and registers the secure element public key, a server key generation unit that generates a server public key and a server private key, and a server output unit that outputs the generated server public key to the secure element. The secure element further includes a secure element registration unit that obtains and registers the server public key.SELECTED DRAWING: Figure 1 【課題】鍵の事前共有を必要としない暗号通信システム、セキュアエレメント、デバイス及び暗号通信方法を提供する。【解決手段】セキュアエレメントは、セキュアエレメント公開鍵及びセキュアエレメント秘密鍵を生成するセキュアエレメント鍵生成部と、生成したセキュアエレメント公開鍵をサーバへ出力するセキュアエレメント出力部とを備え、サーバは、セキュアエレメント公開鍵を取得して登録するサーバ登録部と、サーバ公開鍵及びサーバ秘密鍵を生成するサーバ鍵生成部と、生成したサーバ公開鍵をセキュアエレメントへ出力するサーバ出力部とを備え、セキュアエレメントは、さらに、サーバ公開鍵を取得して登録するセキュアエレメント登録部を備える。【選択図】図1
Bibliography:Application Number: JP20240030428