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BioChop™ a technology solution for securing electronic documents

Nowadays, as e-commerce and remote business-transactions have become common business practice, the need for electronic documentation and document authenticity, as well as the definite identification of the e-signing parties, have become one of the most challenging goals. The current solutions for signing electronic documents are using digital certificates that are generated using a-synchronic encryption of public and private keys (PKI). While using such technologies allows electronic documents to be easily signed, and the authenticity and integrity of the signed documents to be well protected, the main hindrance in adopting these technologies is in their inability to integrate human signature (handwriting signature) within the digitally signed documents. This means that a definite identification of the signer is not possible, and relies on somewhat circumstantial evidence (email address, location of signing, etc.).ANB has identified this technological challenge and developed a unique mechanism that provides a BioChop™ stamp that encapsulates the user biometric signature information (of his/her handwriting signature) along with the user signature image.

BioChop™ technology can be implemented via desktop PCs or smartphones (equipped with touchscreens) to support remote and secure signing of electronic documents. The technology can be implemented and integrated with leading electronic documents’ formats such as Microsoft Word and Adobe PDF.


There are various models of implementation methods for signing a digital/electronic document using ANB’s BioChop™. It can support full digitally signed signatures (with digital certificate) or light signatures (named WET signature BioChop™ stamp) which do not include digital certificate but encapsulate the user’s biometric signature information along with its signed signature image.


BioChop’s™ WET signature was developed in order to reduce the overhead on electronic documents that can be caused when there are many signature fields that should be signed by the same user. Using digital signature certificates can dramatically increase the size of the signed document and make it impossible/impractical for electronic document to use the exchange mechanism. BioChop™ technology is the only technology of its kind that overcomes this drawback, which becomes a practical limitation in fully implementing digital signature certificate technology. Using BioChop technology, one needs to sign only once per signature field using full digital signature certificate (which increases the size of the signed electronic document) and sign the rest of the signature fields using ANB WET signature stamps (which are much lighter in size). Each ANB's BioChop stamp adds only ~8K bytes to the size of the electronic document and therefore efficiently overcomes the current limitation of digital signature certificate technologies.

The following figure shows a screenshot example of ANB BioChop™ stamp:



The biometric signature information is hidden and encapsulated within the ANB BioChop’s™ stamp. The ANB BioChop™ stamp includes ANB’s Technology Stamp, the user’s handwriting signature image, the signed digital signature certificate and a time stamp. Any change to the document content will cancel the validity of the digital Chop. This way, it protects the authenticity and the integrity of the content of any digitally/electronically signed document.



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