How easy is to crack E3 Master Password?

Dear Espionage 3 Team,
Assuming someone managed to get inside my Mac, may I ask you how easy would be for this person to crack E3 Master Password therefore gaining direct access to the images I´ve created (assuming I am not using plausible deniability)?
Could it be possible for you to implement a feature that protects the Master Password say, after 3 failed login attempts there will be a delay of 10 minutes to allow access attempts again, if it fails again then it will double the time to attempt login up to 20 minutes, and so on?
Thanks for your advise.
Alberto.
Assuming someone managed to get inside my Mac, may I ask you how easy would be for this person to crack E3 Master Password therefore gaining direct access to the images I´ve created (assuming I am not using plausible deniability)?
Could it be possible for you to implement a feature that protects the Master Password say, after 3 failed login attempts there will be a delay of 10 minutes to allow access attempts again, if it fails again then it will double the time to attempt login up to 20 minutes, and so on?
Thanks for your advise.
Alberto.