參照
說明: Specifies the encryption method for encrypting MIME messages to recipients whose public keys are shorter than 512 bits.可能的值如下:
RC2_56
RC2_64
RC2_80
RC2_128
RC5_5
RC5_7
RC5_10
RC5_16
DES
3DES
預設值:無
UI 相當於:無
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