Indicating status for digital signatures

A software product, tangibly embodied in a machine-readable medium, for presenting status of digital signatures, the software product comprising instructions operable to cause one or more data processing apparatus to perform operations comprising:

• receiving a digital document that defines a presentation structure and includes a digital signature, the digital document specifying a representation of the digital signature and a location in the presentation structure for the representation of the digital signature;
• determining a status for the digital signature;
• associating a status representation with the digital signature, the status representation identifying the status determined for the digital signature;
• without altering the representation of the digital signature, presenting at least a portion of the digital document and the status representation of the digital signature in a user interface, the status representation being presented in the presentation structure at a location that depends upon the location in the presentation structure for the representation of the digital signature;
• and
• wherein the representation of the digital signature includes a graphical representation of the digital signature.

A system comprising:

• an output device;
• and
• a computer programmed to perform operations comprising:
• receiving a digital document that defines a presentation structure and includes a digital signature, the digital document specifying a representation of the digital signature and a location in the presentation structure for the representation of the digital signature;
• determining a status for the digital signature;
• associating a status representation with the digital signature, the status representation identifying the status determined for the digital signature;
• without altering the representation of the digital signature, presenting at least a portion of the digital document and the status representation of the digital signature in a user interface, the status representation being presented in the presentation structure at a location that depends upon the location in the presentation structure for the representation of the digital signature;
• and
• wherein the representation of the digital signature includes a graphical representation of the digital signature.