- 128-bit, 192-bit and 256-bit AES encryption with the OFB mode of operation
MmoEncryption (Property) In french: CryptageMmo
  Available only with these kinds of connection
 Warning
From version 28 (75), MmoCryptMethod is kept for backward compatibility. This property is replaced by MmoEncryption.
The MmoEncryption property is used to set the encryption method of the memo file (.MMO) associated with the data file. You can: - Find out the encryption mode of a memo file associated with a data file (file defined in the data model editor or through programming).
- Define the encryption mode of a memo file associated with a data file during its description through programming.
// Find out the encryption mode of the memo file associated with the Customer data file
ResEncrypt = Customer.MmoEncryption
Syntax
Finding out the encryption mode of a MMO file Hide the details
<Current encryption mode> = <Data file>.MmoEncryption
<Current encryption mode>: Integer constant The encryption modes are: | | | hEncryptionAES128 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 128-bit AES algorithm with Output feedback (OFB). | | hEncryptionAES192 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 192-bit AES algorithm with Output feedback (OFB). | | hEncryptionAES256 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 256-bit AES algorithm with Output feedback (OFB). | | hEncryptionAuto | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionNO | No encryption is performed on the file. | | hEncryptionRC5_12 | The memo file is encrypted using an optimized 12-round RC5 encryption algorithm (128 bits). | | hEncryptionRC5_16 | The memo file is encrypted using an optimized 16-round RC5 encryption algorithm (128 bits). | | hEncryptionStandard | The memo file is encrypted using an optimized 128-bit encryption algorithm. |
<Data file>: Character string Name of the data file used. This name was defined in the data model editor or with the File Description type.
Defining the encryption mode of a MMO file Hide the details
<Data file>.MmoEncryption = <New encryption mode>
<Data file>: Character string Name of the data file used. This name was defined by the File Description type. <New encryption mode>: Integer constant The encryption modes are: | | | hEncryptionAES128 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 128-bit AES algorithm with Output feedback (OFB). | | hEncryptionAES192 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 192-bit AES algorithm with Output feedback (OFB). | | hEncryptionAES256 | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted using a 256-bit AES algorithm with Output feedback (OFB). | | hEncryptionAuto | Encryption is performed only if a password is set for the data file. In this case, the memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionNO | No encryption is performed on the file. | | hEncryptionRC5_12 | The memo file is encrypted using an optimized 12-round RC5 encryption algorithm (128 bits). | | hEncryptionRC5_16 | The memo file is encrypted using an optimized 16-round RC5 encryption algorithm (128 bits). | | hEncryptionStandard | The memo file is encrypted using an optimized 128-bit encryption algorithm. |
Remarks 128-bit, 192-bit and 256-bit AES encryption with the OFB mode of operation - If the Memo file is encrypted using the AES algorithm, it is necessary to use the same method to encrypt the data (FicEncryption property) and the indexes (NdxEncryption property).
- If there is encryption that uses the AES algorithm, the option "High security level with password" is automatically applied.
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