Complex sentence: Martin E. Hellman (born October 2,1945) is a cryptologist, famous for his invention of public key cryptography in cooperation with Whitfield Diffie and Ralph Merkle.
Split into simpler sentences: Martin E. Hellman (born October 2,1945) is a cryptologist, famous for his invention of public key cryptography. He did this in cooperation with Whitfield Diffie and Ralph Merkle.