Until we have a robust accumulator, we now have RandomGenerator>>#generateKey to seed our Randoms upon first usage every image start. This method generates 32 random bytes by enumerating a variety of hard-to-guess information, using feedback and chaining all prior values, making it basically impossible to guess.
So even quitting (without saving) and restarting the same image, you get different seeds every time.
cryptography@lists.squeakfoundation.org