▲ 5 ▼ SIDH in Go for quantum-resistant TLS 1.3

If it were possible to build a large-scale quantum computer, many of the problems whose difficulty we rely on for security would no longer be difficult to solve. While it remains unknown whether large-scale quantum computers are possible (see this article for a good overview), it's a sufficient risk that there's wide interest in developing quantum-resistant (or post-quantum) cryptography: cryptography that works on ordinary computers we have today, but which is secure against a possible quantum computer.