## What is RSA key exchange and how does it work?

## What is the difference between public RSA key and private key?

- The public
**RSA key is**the encryption**key**, whereas the private**key**(which must be kept secret to ensure that only the intended recipient can read the data)**is**the decryption**key**. One thing worth noting**is**that the**RSA**algorithm**is**actually pretty slow, primarily because of its asymmetric nature.

## Is there a way to defeat RSA encryption?

- There are no published methods to defeat the system if a large enough
**key is**used.**RSA is**a relatively slow algorithm. Because of this, it**is**not commonly used to directly encrypt user data. More often,**RSA is**used to transmit shared keys for symmetric**key**cryptography, which are then used for bulk encryption-decryption.

## What is the difference between RSA and OpenSSL?

- In the
**RSA**algorithm the public**key is**build using the modulus and the public exponent, which means that we can always derive the public**key**from the private**key**. OpenSSL can easily do this with the to generate a private**key**. The allows us to set the value for specific**key**options.

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