36-image converter 4.7 will not contain a filter to encrypt or decrypt an image using a password.
It was previously announced but all tests failed. The Encryption filter worked but only for area’s of eg. 600 pixels at a time. If the filter was applied on an image of 1800×1800 you would’ve had no problems 1800/600=3 x 3 squares which were handled by the filter, but when applying it to eg. a 700×700 image you would have one square to which the filter was applied and the rest would be slightly pointilized.
Another problems was that the decryption filter didn’t completely return the image to default, so we would be unable to finish a fully working en-/decrypt filter in 36-image converter 4.7.
But there is good news as well, while researching the failed filter, we stumbled upon some nice paintbrush effect which we will call GlassBrush and which will be included in 36IC 4.7. We also developed some more color alteration filters and we are continuing our research to include more filters in future releases.