A method for encoding information within a feature of a document. The method includes at least one computer processors determining information to encode within a document. The method further includes identifying a feature within the document to encode information within based, at least in part, on metadata of the document corresponding to the feature. The method further includes determining a set of geometric properties of one or more segments of the identified feature. The method further includes encoding, by one or more computer processors, a first bit of information of the determined information within a first segment of the feature within the document by modifying one or more geometric properties respectively associated with the first segment. The method further includes outputting the document with information encoded within the first segment.