Authorizing a Payment with Mastercard Using Merchant Decryption Method {#samsungpay-auth-merchant-mc-intro}
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This section provides the following information:

* [Required Fields for Authorizing a Payment Using Mastercard and the Merchant Decryption Method](/docs/cybs/en-us/samsung-pay/developer/streamline2/rest/samsungpay/samsungpay-services/samsungpay-auth-intro/samsungpay-auth-merchant-mc-intro/samsungpay-auth-merdecypt-mc-mandatory.md "")
* [Authorizing a Payment](/docs/cybs/en-us/samsung-pay/developer/streamline2/rest/samsungpay/samsungpay-services/samsungpay-auth-intro/samsungpay-auth-cybs-amex-intro/samsungpay-auth-procedure.md "")
* [Example: Merchant Decryption with Mastercard Using the REST API](/docs/cybs/en-us/samsung-pay/developer/streamline2/rest/samsungpay/samsungpay-services/samsungpay-auth-intro/samsungpay-auth-merchant-mc-intro/samsungpay-auth-merdecrypt-ex-mc-rest.md "")
  {#samsungpay-auth-merchant-mc-intro_ul_pcj_krp_npb}