Method multiply

src/main/java/com/thealgorithms/ciphers/ECC.java:221–234

Multiply a point by a scalar (repeated addition).

(BigInteger k, BigInteger p, BigInteger a)

         * Multiply a point by a scalar (repeated addition).
         */
        public ECPoint multiply(BigInteger k, BigInteger p, BigInteger a) {
            ECPoint result = new ECPoint(BigInteger.ZERO, BigInteger.ZERO); // Identity point
            ECPoint addend = this;

            while (k.signum() > 0) {
                if (k.testBit(0)) {
                    result = result.add(addend, p, a); // Add the current point
                }
                addend = addend.add(addend, p, a); // Double the point
                k = k.shiftRight(1); // Divide k by 2
            }

            return result;
        }
    }
}