Variable edge document encoding for secure document storage and retrieval

A print system comprising:

• a print engine of a print device;
• and a computing device comprising a processor and a memory containing programming instructions that are configured to cause the processor to, in response to receiving a first set of one or more electronic source document files, each of which includes content of one or more corresponding source documents:
• generate a verification image, segment the verification image into a plurality of slices, cause the print engine to print a plurality of verification document sheets by printing, in sequence on each verification document sheet:
• data from one of the source electronic document files, and on an edge of the verification document sheet, a unique one of the slices of the verification image, and after printing each verification document sheet, cause the print device to place that verification document sheet onto a stack so that the slices appear on a side of the stack and, when all of the verification document sheets have been placed onto the stack, the slices collectively form the verification image.