ECC was introduced in 1985, Curve25519 in 2005, and Edwards Curves in 2007 Post-quantum public key algorithms have existed for a while, e.g. https://en.wikiped

ECC was introduced in 1985, Curve25519 in 2005, and Edwards Curves in 2007 Post-quantum public key algorithms have existed for a while, e.g. https://en.wikipedia.org/wiki/McEliece_cryptosystem https://en.wikipedia.org/wiki/McEliece_cryptosystem (1978) and https://en.wikipedia.org/wiki/NTRU https://en.wikipedia.org/wiki/NTRU (1996), the issue is settling on one that has acceptable performance and key lengths