1. An apparatus for processing information such as words, figures and pictures to facilitate tracing the source of origin of a copy of a document, comprising: first memory means for storing character information comprising characters including letters, numbers, punctuation marks, symbols, figures and pictures, each character having an inherent meaning; input means, connected to said first memory means, for entering selection commands for formatting the character information if accordance with a form of a desired document; display means, connected to said first memory means, for reading characters denoted by and selection commands out of said first memory means and for displaying the read out characters; second memory means, connected to said display means for storing text information including characters read out and displayed by said display means; first output means, connected to said second memory means, for outputting the text information stored in said second memory means; conversion means, connected to said second memory means, for modifying selectively a configuration of at least one character in said text information in such a way that said inherent meaning of said at least one character and a textual content of said text information are not altered, but the source of origin of versions of said text is encoded in said modified character configuration: and, second output means connecting said conversion means to said second memory means for inserting said at least one modified character configuration in said text information stored in the second memory means, so that said first output means presents a modified copy of a document including such encoded origin information, wherein the character configuration modification is detecable only upon close visual inspection; thereby allowing an investigator to trace and find the source of said copy of said document including the modification when said document was improperly disclosed.
1. An apparatus for processing information such as words, figures and pictures to facilitate tracing the source of origin of a copy of a document, comprising: first memory means for storing character information comprising characters including letters, numbers, punctuation marks, symbols, figures and pictures, each character having an inherent meaning; input means, connected to said first memory means, for entering selection commands for formatting the character information if accordance with a form of a desired document; display means, connected to said first memory means, for reading characters denoted by and selection commands out of said first memory means and for displaying the read out characters; second memory means, connected to said display means for storing text information including characters read out and displayed by said display means; first output means, connected to said second memory means, for outputting the text information stored in said second memory means; conversion means, connected to said second memory means, for modifying selectively a configuration of at least one character in said text information in such a way that said inherent meaning of said at least one character and a textual content of said text information are not altered, but the source of origin of versions of said text is encoded in said modified character configuration: and, second output means connecting said conversion means to said second memory means for inserting said at least one modified character configuration in said text information stored in the second memory means, so that said first output means presents a modified copy of a document including such encoded origin information, wherein the character configuration modification is detecable only upon close visual inspection; thereby allowing an investigator to trace and find the source of said copy of said document including the modification when said document was improperly disclosed. 14. An apparatus according to claim 1, wherein said conversion means comprises a memory for storing a correlation file which denotes a relationship between sadi modification of configuration of said at least one character and a delivery address of a respective document, and means for automatically selecting said modification of configuration of said at least one character in accordance with said correlation file.