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Relationship between RSA, Diffie-Hellman Key Exchange, PKI and X.509?

Çağlar Arlı      -    15 Views

Relationship between RSA, Diffie-Hellman Key Exchange, PKI and X.509?

I am getting confused with RSA, Diffie-Hellman Key Exchange, PKI and X.509v3.

RSA's mathematics algorithm seems like an encryption algorithm, right? Generating public key and private key, using for encryption and decryption...

Diffie-Hellman's mathematics algorithm seems just like a key exchange, right? Each side can calculate the same key by using some kinds of algorithm. It seems not an encryption, right?

For PKI, there is something new which is the CA and digital certificate. Public key and private key are also mentioned.

So, what is the relationship between these concepts? Are they 3 separate concepts? Or they will be used together in reality?

Also, is X.509 the standard of PKI? So PKI itself is not a standard?