Public key cryptography revolutionized secret messaging, using two keys: one public, one private. Like magic ink, messages disappear and reappear. The UK first unearthed this concept in the 70s, later advancing by American researchers. The RSA algorithm became the foundation, creating secure internet transactions and digital signatures. But quantum computers could shatter this system, threatening internet security. However, quantum-safe solutions are being developed. Public key cryptography will continue evolving, ensuring messages remain hidden and protected. The ability to adapt and reinvent ensures that secret messages will remain secure, with new encryption methods always on the horizon.
https://www.quantamagazine.org/how-public-key-cryptography-really-works-20241115/