A computing system for generating and displaying an encoded document for peripheral privacy is provided. The computing system includes a processor executing a program using portions of memory to determine an initial document, generate an encoded document based on the initial document by modifying letters in a text portion of the initial document, and output the encoded document. In another example, a computing system for displaying an encoded document for peripheral privacy is provided. The computing system includes a processor executing a program using portions of memory to receive an initial document and an encoded document, determine a gaze location of a user using a camera, generate a mask based on the determined gaze location, and display an alpha-blended document by alpha-blending the initial document and the encoded document using the mask.