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Question

Public key cryptography was invented by.

A
Whitfield Diffie and Martin Hellman
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B
Network team of Motorola engineers
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C
Microsoft.team
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D
None of the above
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Solution

The correct option is A Whitfield Diffie and Martin Hellman

Public key cryptography was invented by Whitfield Diffie and Martin Hellman.

These skirmishes became known as the first of the “crypto wars.” ... “Cryptography is the one indispensable security technique,” said Diffie, who was a part-time researcher at Stanford at the time he and Hellman invented public-key cryptography.

The distinguishing technique used in public key cryptography is the use of asymmetric key algorithms, where a key used by one party to perform encryption is not the same as the key used by another in decryption. Each user has a pair of cryptographic keys – a public encryption key and a private decryption key.

Public-key encryption is a cryptographic system that uses two keys -- a public key known to everyone and a private or secret key known only to the recipient of the message. Example: When John wants to send a secure message to Jane, he uses Jane's public key to encrypt the message.

Asymmetric cryptography, also known as public key cryptography, uses public and private keys to encrypt and decrypt data. ... One key in the pair can be shared with everyone; it is called the public key. The other key in the pair is kept secret; it is called the private key.


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