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- 128-bit, 192-bit and 256-bit AES encryption with the OFB mode of operation
NdxEncryption (Property) In french: CryptageNdx
  Available only with these kinds of connection
 Warning
From version 28 (75), NdxCryptMethod is kept for backward compatibility. This property is replaced by NdxEncryption.
The NdxEncryption property is used to configure the encryption method for the index (.NDX) file associated with the data file. You can: - Identify the encryption method of an index file associated with a data file (file defined in the data model editor or through programming).
- Defining the encryption mode of an index file associated with a data file during its description through programming.
// Identify the encryption method for the index file associated with the Customer data file
ResEncrypt = Customer.NdxEncryption
Syntax
Identifying the encryption method of an index file Hide the details
<Current encryption mode> = <Data file>.NdxEncryption
<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 index 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 index 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 index 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 index file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionNO | No encryption is performed on the index file. | | hEncryptionRC5_12 | The index file is encrypted using an optimized 12-round RC5 encryption algorithm (128 bits). | | hEncryptionRC5_16 | The index file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionStandard | The index file is encrypted according to an optimized encryption algorithm (on 128 bits). |
<Data file>: Character string Name of the data file used. This name was defined by the File Description type.
Defining the encryption method for the index file Hide the details
<Data file>.NdxEncryption = <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 index 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 index 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 index 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 index file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionNO | No encryption is performed on the index file. | | hEncryptionRC5_12 | The index file is encrypted using an optimized 12-round RC5 encryption algorithm (128 bits). | | hEncryptionRC5_16 | The index file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits). | | hEncryptionStandard | The index file is encrypted according to an optimized encryption algorithm (on 128 bits). |
Remarks 128-bit, 192-bit and 256-bit AES encryption with the OFB mode of operation - If the index file is encrypted using the AES algorithm, the same encryption method must be used for the memos (MmoEncryption property) and the data (FicEncryption property).
- If there is encryption that uses the AES algorithm, the option "Enable a high-security level " is automatically applied.
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