40. The method of claim 39, wherein the step of decrypting said identifiers includes the step of selecting an appropriate set of decryption routines based on said document type classification.
40. The method of claim 39, wherein the step of decrypting said identifiers includes the step of selecting an appropriate set of decryption routines based on said document type classification. 42. The method of claim 40, wherein said decrypting step includes performing geography specific keyword look-ups, short word analysis, limited dictionary pattern matching and full dictionary pattern matching, where said document has been determined to be a business letter.