Can you describe what you mean by plausible deniability if in your example you can prove from any of the individual Shufflecake volumes that there's X amount of data in the others?
3-volume Shufflecake setup with on a 100 gb device. I put 10 gigabytes into #1, 20 gigabytes in #2 and so in #3, I can only store 70 gb of data before I get I/O errors, which leaks that there's 30 gigabytes of data in the other volumes.
3-volume Shufflecake setup with on a 100 gb device. I put 10 gigabytes into #1, 20 gigabytes in #2 and so in #3, I can only store 70 gb of data before I get I/O errors, which leaks that there's 30 gigabytes of data in the other volumes.