Comment on Safe curves for Elliptic Curve Cryptography [pdf]parentComments−ogogmad2yTl;dr reason: RSA requires larger key sizes, which makes it slower. ECC makes cryptanalysis more complicated, so the keys can be made smaller, which makes it faster.
Comments
Tl;dr reason: RSA requires larger key sizes, which makes it slower. ECC makes cryptanalysis more complicated, so the keys can be made smaller, which makes it faster.