RSA
The most classic public key encryption algorithm. Based on the problem of large integer decomposition. Good compatibility, but long key and slow computation.
ECC
Elliptic curve encryption. Based on the elliptic curve discrete logarithm problem. Short key, fast speed, and high security. Mobile devices and IoT are more suitable.
How to choose
RSA: Compatibility first. ECC: Performance first. Most modern websites come with both.
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