ViewSonic follows AES 256 and RSA 2048 , the highest industry standards for encryption. The 256-bit AES encryption is built into a small chip inside the pen display, which scrambles data into unreadable code. When the user signs on the pen display the data is encrypted while being transferred via USB cable.This ensures the security of data transmission from the hardware to the software.
After documents are signed and saved via our software, the biometric data from the signature is encrypted once again. This ensures that even if an outsider were to gain access to the PDF document, the would be unable to steal the signature data and other personal information. It is estimated that it would take a super computer about two years to be able to decrypt the data.
Before encryption The values in the boxes are the x, y, p values. Before encryption, it is easy for the outsiders to formulate a signature based on the values (figure 1)
(Figure 1: before encryption)
After encryption However, after encryption, the values are scrambled making it difficult for an outsider to differentiate between the x, y, p values (figure 2).
(Figure 2: after encryption the values are scrambled)
*Note: encryption is an extra feature offered by ViewSonic which could be added upon request. Clients are able to use utilize pen displays/pen tablets with the electronic signature option without the encryption feature.