Dynamic preview of electronic signature appearance

1. A method to sign an electronic document, the method comprising:

at the time of electronically signing an electronic document, receiving a first input providing an electronic signature appearance, where the electronic signature appearance comprises a visual manifestation of a signature on the electronic document and includes at least one of graphical or textual elements;

providing a preview of the electronic signature appearance in a bounding region, where the bounding region is a region on the electronic document where the electronic signature appearance will appear;

receiving a second input editing the bounding region while previewing the electronic signature appearance and before electronically signing the electronic document; and

providing a preview of the electronic signature appearance in the edited bounding region; and

receiving a third input signing the electronic document with an electronic signature, the electronic signature appearance being included in the electronic document signed with the electronic signature, where the electronic signature comprises code derived from the signed electronic document and a private key.

2. The method of claim 1 , further comprising:

interacting with a user to establish the bounding region on the electronic document.

3. The method of claim 1 , wherein the bounding region is pre-set in the electronic document by an author of the electronic document.

4. The method of claim 1 , wherein the electronic signature appearance includes a plurality of layers including a first validity layer for presentation of a dynamic validity graphic, an appearance layer for presentation of the visual manifestation of the signature, and a second validity layer above the first validity layer for presentation of an invalidity graphic.

5. The method of claim 1 , wherein providing a preview of the electronic signature appearance includes displaying the electronic signature appearance within the bounding region on a display of the electronic document.

6. The method of claim 1 , further comprising:

determining an optimal layout of the electronic signature appearance based on the dimensions of the bounding region.

7. The method of claim 1 , further comprising:

determining optimal dimensions of the bounding region based on the electronic signature appearance.

8. A non-transitory computer readable storage medium encoded with a computer program product comprising instructions operable to cause a programmable processor to:

at a time of electronically signing an electronic document, receive a first input providing an electronic signature appearance, where the electronic signature appearance comprises a visual manifestation of a signature on the electronic document and includes at least one of graphical or textual elements;

provide a preview of the electronic signature appearance in a bounding region, where the bounding region is a region on the electronic document where the electronic signature appearance will appear;

receive a second input editing the bounding region while previewing the electronic signature appearance and before electronically signing the electronic document and provide a preview of the electronic signature appearance in the edited bounding region; and

receive a third input signing the electronic document with an electronic signature, the electronic signature appearance being included in the electronic document signed with the electronic signature, where the electronic signature comprises code derived from the signed electronic document and a private key.

9. The non-transitory computer-readable storage medium of claim 8 , where the computer program product further comprises instructions operable to cause a programmable processor to:

interact with a user to establish the bounding region on the electronic document.

10. The non-transitory computer-readable storage medium of claim 8 , wherein the bounding region is pre-set in the electronic document by an author of the electronic document.

11. The non-transitory computer-readable storage medium of claim 8 , wherein the electronic signature appearance includes a plurality of layers including a first validity layer for presentation of a dynamic validity graphic, an appearance layer for presentation of the visual manifestation of the signature, and a second validity layer above the first validity layer for presentation of an invalidity graphic.

12. The non-transitory computer-readable storage medium of claim 8 , wherein instructions operable to cause a programmable processor to provide a preview of the electronic signature appearance include wherein instructions operable to cause a programmable processor to:

display the electronic signature appearance within the bounding region on a display of the electronic document.

13. The non-transitory computer-readable storage medium of claim 8 , where the computer program product further comprises instructions operable to cause a programmable processor to:

determine an optimal layout of the electronic signature appearance based on the dimensions of the bounding region.

14. The non-transitory computer-readable storage medium of claim 8 , where the computer program product further comprises instructions operable to cause a programmable processor to:

determine optimal dimensions of the bounding region based on the electronic signature appearance.

15. The non-transitory computer-readable storage medium of claim 8 , wherein, prior to validation of the electronic signature, a default validity graphic is presented in the first validity layer and if the electronic signature is validated then the electronic signature appearance dynamically changes to present a validity graphic in the first validity layer reflecting the validation and if the electronic signature is invalidated, then the electronic signature appearance dynamically changes to present an invalidity graphic in the second validity layer reflecting the invalidation.

16. A system comprising:

a processor;

a storage device coupled to the processor and configurable for storing instructions, which, when executed by the processor, cause the processor to perform operations comprising:

at a time of electronically signing an electronic document, receiving a first input providing an electronic signature appearance, where the electronic signature appearance comprises a visual manifestation of a signature on the electronic document and includes at least one of graphical or textual elements;

providing a preview of the electronic signature appearance in a bounding region, where the bounding region is a region on the electronic document where the electronic signature appearance will appear;

receiving a second input editing the bounding region while previewing the electronic signature appearance and before electronically signing the electronic document and provide a preview of the electronic signature appearance in the edited bounding region; and

receiving a third input signing the electronic document with an electronic signature, the electronic signature appearance being included in the electronic document signed with the electronic signature, where the electronic signature comprises code derived from the signed electronic document and a private key.