y2 ≡ x3 + a.x + b mod p mobile 4.a3+27.b2 ≠ 0 mod p elliptic curves (160-256 bit) than for rsa(1024-30 discrete logarithmic problem rsa ecc decryption encryption security diffie hellman exchange elgamal one way function elliptic curve cryptosystem key size elliptic curve cryptography point doubling point addition dlp
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