> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/xpay-enablement/ja/api-rifarensu/sekyuriti.md).

# セキュリティ

API は異なるセキュリティ層に依存しています：

* トランスポートレベルでは、TLS 相互認証が使用されます。
* アプリケーションレベルでは：
  * 機密性の高いカード情報（PAN）は PKCS#7 形式（RFC 2315/5652）で暗号化されます。
  * データ準備およびパーソナライズに使用されるデータ要素は、共通鍵暗号（対称鍵暗号）を使用して暗号化されます。


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