@xhakxh wrote: I am curious about the encryption algorithm of VMware WorkStation Pro.

What is the Encryption Algorithm in VMware?

@xhakxh wrote: Is VMware WorkStation Pro's built-in encryption secure?

Well, that's a pretty open question . . . but, suspect that it may well be no worse than any other providers implementation.  One thing that you will need to consider, is regards to some of the limitations for the management of the VM once encrypted, i.e. restrictions in the ability to edit the .vmx file.

@xhakxh wrote: Originally, the guest was going to use Bitlocker, but after using it, the disk occupancy reached 100% and it freezes.

Is this related to a VM resource allocation issue or do you believe that its related to something else ?