PaperWallet

PaperWallet was a popular online platform launched around 2013-2014 that enabled users to create public and private cryptographic keys for various cryptocurrencies, including Bitcoin and Ethereum. The keys could be printed onto a physical document, creating a "paper wallet." This method was promoted as a highly secure "cold storage" solution, designed to protect digital assets from online threats like hacking by keeping the private keys completely offline. However, the service was compromised in 2019, leading to the theft of user funds and the eventual shutdown of the platform.