Chart based encryption
But it can depend on what one wishes to achieve and that is where chart based encryption and its variants come into play.
If one is producing a company annual report and there is some data that is unflattering that one needs to report on then a 3D pie chart with 100+ segments is ideal. It visualises the data but it is nigh on impossible for a human to mentally extract much insight from it.
Bar charts with axis not starting at zero are great for biasing human insight.
And the classic for obfuscation is simply loads of high res colourful, but irrelevant images. The human eye is naturally drawn to the pretty pics as opposed to the unflattering data.