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Whitfield Diffie is one of the creators of public key cryptography in the 1970's. Martin Hellman and Ralph Merkle were the others. Together they created the company RSA to bring encryption products to the marketplace.

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Which algorithm do you use to exchange shared private keys?

The diffie hellman key exchange uses prime numbers to generate an asymmetric key pair which is used to create a secure channel over which a privet symmetric key can be sent.


What is a hard exponent problem?

A hard exponent problem typically refers to a mathematical problem that involves computing or solving equations involving exponents that are computationally intensive or infeasible to solve efficiently. One common example is the discrete logarithm problem, where given a base ( g ) and a value ( g^x ) in a finite field, finding ( x ) is computationally challenging. Such problems are foundational in cryptography, particularly in schemes like Diffie-Hellman and RSA, where their difficulty ensures security.


Examples of public key cryptography?

Public Key Cryptography is a method of secure communication. It involves the creation of both a public and a private key. When sending a message, the sender encrypts the message with the recipients public key. After receiving the message, the recipient may then decode the message with his/her associated private key. One area that public key cryptography is used in is SSL / TLS (Secure Socket Layer). An example of an SSL library is the CyaSSL Embedded SSL Library. CyaSSL provides several public key cryptography options, including RSA, DSS, DH, and NTRU. In addition to SSL, Public Key Cryptography is used in a large variety of techniques, algorithms, and protocols including: Diffie-Hellman key exchange protocol RSA Encryption Algorithm Cramer-Shoup cryptosystem NTRUEncrypt cryptosystem GPG, OpenPGP Internet Key Exchange PGP