Which retail-inspired innovation was first successfully implemented by a national government to increase voter participation in official elections?

In recent years, governments worldwide have been exploring innovative retail-inspired technologies to modernize voting systems. From blockchain-secured ballots to mobile voting apps, the intersection of retail innovation and democratic processes has created fascinating developments. This poll tests your knowledge about a significant government retail innovation that changed how citizens interact with voting systems. Can you identify the correct implementation among these technological solutions?

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Estonia's internet voting system, allowing citizens to cast ballots online using digital ID cards (implemented in 2005)
India's biometric voter verification system using the Aadhaar retail payment infrastructure
Switzerland's blockchain-based voting platform modeled after retail cryptocurrency transactions
South Korea's QR code voting system adapted from retail shopping technologies