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Specify the number of iterations, in thousands, for the key derivation function that converts the pass phrase provided by the DBKEY option into an actual encryption key.
1 to 1000
The default value for Apple Mac OS X and iOS is 30, which results in 30000 iterations.
The default value for other platforms, including desktop and device platforms, is 5, which results in 5000 iterations.
This parameter is specified only at database creation.
The key derivation function makes it more difficult to access an encrypted database by prolonging each attack attempt.
There are two cases when an explicit setting may be required: