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(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_scalarmult — Compute a shared secret given a user's secret key and another user's public key
$n, string $p): string
Elliptic Curve Diffie-Hellman. Calculates scalar n times point p, on an elliptic curve.
n
scalar, which is typically a secret key
p
point (x-coordinate), which is typically a public key
A 32-byte random string.
