Which cryptographic protocol, invented in 1994, became the foundation for secure e-commerce transactions and is still indicated by a padlock icon in web browsers today?

E-commerce has transformed how we shop and do business. Behind today's trillion-dollar online marketplace lies a fascinating history of innovation and discovery. This trivia question explores a pivotal moment in the development of e-commerce technology that made secure online transactions possible and paved the way for the digital economy we know today. Test your knowledge about this revolutionary invention that changed retail forever!

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SSL (Secure Sockets Layer)
FTP (File Transfer Protocol)
HTTP (Hypertext Transfer Protocol)
TCP/IP (Transmission Control Protocol/Internet Protocol)