An electronic signature, or biometric signature, refers to a string of numbers that are arithmetically linked together and that are used to confirm signature data that has been generated by one or more parties involved in a transaction. Typically, biometric data is recorded digitally in an electronic format, so that every time it is processed, it is stored in a database that can be accessed by anyone who has access to that database. The use of this technology is on the rise all over the world. The number of people who now have access to the database will continue to increase along with the use of this technology.
A good example of the use of Firma electrónica SII the use of debit cards. If you go to your bank and deposit a money order, then the money order is automatically converted into a physical card, and the card can be used to make purchases at stores that accept debit cards. These electronic signatures are highly secure, as they are not only foolproof but also impossible to forget. This is a major advancement in financial security.
A less secure method of using electronic signatures is the manner in which certain items are digitally "marked" when you make a purchase. When you go to a store to pay for something, a plastic card is swiped against your finger. The card contains a particular number (your PIN) that is programmed into the chip that the store has. When you give this number to the cashier, a special transfer code is written on the back of the card. The cashier's code then enables him to check whether he recognized the signature that was verified against your signature - if your signature matched the digital signature on the back of the card, the item is yours and it is then clear that you paid for the item that you were shopping for.
With Firma electrónica SII , it is important to ensure that the information that is loaded into the system matches with the logical association that is expected from the information that is entered into the system. For instance, when you fill out an online form to order something on eBay, you would probably expect that the logical association from your e-mail address to the credit card that you used to make your purchase is logical. Logically, it should match. However, the electronic signature that is used does not follow this rule - the information on the eBay form cannot reliably be matched with the credit card that you used to make the purchase. If you were to use a credit card in these situations, the electronic signature would provide proof that the purchase was indeed made. But in the case of an e-signed form,
While electronic signatures were not specifically designed to prevent fraud or tamper with signatures, there have been many cases where they have been used in ways that have brought about real problems. One famous example was the unauthorized copying of a federal law passed in the U.S. by Rep. Ron Paul (R-TX). Because of this, his signature was printed on unauthorized voting pamphlets and other literature intended to be distributed at the polls during the election. The result - countless people voted illegally in the election because they did not recognize the signature of their congressman on those absentee voter registration cards.
The problem with these fraudulent electronic signature examples is that the "signature" associated with the electronic signature is also prone to be tampered with. A "complementary" (non-electronic) signature on paper can be photocopied, reproduced, etc. If an individual knows how to do this, he could conceivably tamper with any number of signatures on any number of forms. There are several ways that this could happen. For instance, if a person knows that a particular form has specific instructions for placing the signature of a particular congressional candidate, he could craft some paper to perfectly mimic the exact electronic sound of that voice. Likewise, if someone knows that the electronic signature of an individual has specific instructions for recording a specific voice signature, he could craft paper with the electronic sound of that voice attached.
Check out this related post to get more enlightened on the topic: https://en.wikipedia.org/wiki/Digital_signature.