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  • 128-bit AES encryption with OFB mode of operation
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Stored procedures
MmoCryptMethod (Property)
In french: CryptageMmo
HFSQLHFSQL Client/ServerAvailable only with these kinds of connection
..MmoCryptMethod is used to configure the encryption mode of memo file (.MMO extension) 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 by programming).
  • Define the encryption mode of a memo file associated with a data file during its description by programming.
Example
// Find out the encryption mode of the memo file associated with Customer file
ResEncrypt = Customer..MmoCryptMethod
Syntax

Finding out the encryption mode of a MMO file Hide the details

<Current encryption mode> = <File name>..MmoCryptMethod
<Current encryption mode>: Integer constant
The encryption modes are:
Versions 24 and later
hCryptAES128
New in version 24
hCryptAES128
hCryptAES128
The encryption is performed only if a password is defined for the file. In this case, the memo file is encrypted using a 128-bit AES algorithm with Output feedback (OFB).
Versions 19 and later
hCryptAuto
New in version 19
hCryptAuto
hCryptAuto
The encryption is performed only if a password is defined for the file. In this case, the memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits).
hCryptNoNo encryption is performed on the file.
hCryptRC5_12The memo file is encrypted according to an optimized encryption algorithm (RC5 12 rounds on 128 bits).
hCryptRC5_16The memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits).
hCryptStandardThe memo file is encrypted according to an optimized 128 bits encryption algorithm.
<File name>: Character string (with or without quotes)
Name of data file used. This name was defined in the data model editor or by the File Description type.

Defining the encryption mode of a MMO file Hide the details

<File name>..MmoCryptMethod = <New encryption mode>
<File name>: Character string (with or without quotes)
Name of data file used. This name was defined by the File Description type.
<New encryption mode>: Integer constant
The encryption modes are:
Versions 24 and later
hCryptAES128
New in version 24
hCryptAES128
hCryptAES128
The encryption is performed only if a password is defined for the file. In this case, the memo file is encrypted using a 128-bit AES algorithm with Output feedback (OFB).
Versions 19 and later
hCryptAuto
New in version 19
hCryptAuto
hCryptAuto
The encryption is performed only if a password is defined for the file. In this case, the memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits).
hCryptNoNo encryption is performed on the file.
hCryptRC5_12The memo file is encrypted according to an optimized encryption algorithm (RC5 12 rounds on 128 bits).
hCryptRC5_16The memo file is encrypted according to an optimized encryption algorithm (RC5 16 rounds on 128 bits).
hCryptStandardThe memo file is encrypted according to an optimized 128 bits encryption algorithm.
Remarks
Versions 24 and later

128-bit AES encryption with 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 (..FicCryptMethod) and indexes (..NdxCryptMethod).
  • If there is encryption that uses the AES algorithm, the option "High security level with password" is automatically applied.
New in version 24

128-bit AES encryption with 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 (..FicCryptMethod) and indexes (..NdxCryptMethod).
  • If there is encryption that uses the AES algorithm, the option "High security level with password" is automatically applied.

128-bit AES encryption with 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 (..FicCryptMethod) and indexes (..NdxCryptMethod).
  • If there is encryption that uses the AES algorithm, the option "High security level with password" is automatically applied.
Minimum version required
  • Version 9
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