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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.

image-What is RSA key exchange and how does it work?
image-What is RSA key exchange and how does it work?
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