Which technological innovation, first implemented in e-commerce in 1994, is credited with making online shopping secure enough for widespread consumer adoption?

The e-commerce landscape has evolved dramatically since its inception, transforming how consumers shop and retailers operate. Behind today's seamless online shopping experiences lie groundbreaking innovations that revolutionized retail. This trivia question explores a pivotal moment in e-commerce history that changed online shopping security forever and helped build consumer trust in digital transactions.

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SSL (Secure Sockets Layer) encryption for secure transactions
One-click purchasing patent
QR code payment systems
RFID inventory tracking