What is SSL?
SSL stands for "Secure Sockets Layer". It is a protocol designed to enable applications to transmit information back and forth securely. Applications that use this protocol inherently know how to give and receive encryption keys with other applications, as well as how to encrypt and decrypt data sent between the two.
Some applications that are configured to run SSL include web browsers like Google Chrome, Firefox, Microsoft Edge, Internet Explorer and others, email programs like GroupWise, Outlook, and Outlook Express, FTP (file transfer protocol) programs, etc. These programs are automatically able to receive SSL connections.
To create an SSL connection, however, or to open a secure connection, your application must first have an encryption key assigned to it by a Certification Authority. Once it has a unique key of its own, you can establish a secure connection with every other application that can "speak" the SSL protocol.
SSL and Consumers
Modern web browsers automatically notify you when connection is insecure. As an E-Commerce customer you should NOT send your private information unless their browser assures you it's safe to do so!
If a site is without secure SSL Encryption, simply shop elsewhere.