Cryptography: The math that makes instant messaging secure :

The protocol used by WhatsApp employs concepts such as elliptic curves, the elliptic discrete logarithm and modular arithmetic

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Victor Miller , Martin Hellman , Whitfield Diffie , Joan Daemen , Neal Koblitz , Mikel Lezaun , Vincent Rijmen , Danielj Bernstein , , Montgomery Curve , Advanced Encryption Standard ,