The coming years ahead all transactions worldwide are going to be executed on Internet and thus it makes sense to understand the technology behind the Encryption which is a mathematical process of coding and decoding information and it comes in different bits ranging from 40-bit, 56-bit, 128-bit and highest is 256-bit.
The number of bits (40-bit, 56-bit, 128-bit, 256-bit) tells you the size of the key. Like a longer password, a larger key has more possible combinations. When an encrypted session is established, the encryption level is determined by the capability of the web browser, SSL certificate, web server, and client computer operating system.
Thus it makes sense to make ecommerce transactions through the sites which are secured through encryption and one can pay to get this encryption installed on the site.