11.2. Custom Random Numbers

As of version 3.0.0, REvoSim employs QT’s random number library QRandomGenerator to create its random numbers. Specifically, it uses a QRandomGenerator::global() that is securely seeded. More information about this library can be found at in the Qt documentation: QRandomGenerator class. Earlier versions of REvoSim employed a pre-generated table of 65,536 random numbers 0-255 sourced from 10Mb of quantum-generated random numbers from randomnumbers.info that were packaged into the executable. REvoSim still offers the option to employ this approach via the option to load a custom random numbers file if preferred by the user.

To load a custom file of random numbers use the ‘Commands → Load Random Numbers…’ command from the main menu to open a file selection dialogue.

Custom Random Number file open dialogue.

The random number file should be encoded as a random binary string, and should be a minimum of 65536 bytes. Once the desired file is selected press the ‘Open’ button to import the new random numbers. REvoSim will then ask for a byte offset to read the file from (thus allowing runs to be repeated with the same random numbers, if desired).

Custom Random Number byte offset form.

Note that REVOSIM will always read 65536 bytes; and will throw an error message if it cannot.

Custom Random Number error on load message.

On success a pop-up message reading “New random numbers read successfully” will appear.