Editing Public Key Crypto (section)

== <span style="color: #FFFFFF;">Analyzing</span> ==
{| class="wikitable"
|+ Symmetric vs. Asymmetric
! Feature !! Symmetric (AES) !! Asymmetric (RSA/ECC)
|-
| Key Usage || Same key for Lock/Unlock || Different keys for Lock/Unlock
|-
| Speed || Very Fast (Gigabits/sec) || Very Slow (Milliseconds/operation)
|-
| Key Sharing || Difficult (Must be kept secret) || Easy (Public key is public)
|-
| Main Use || Encrypting big files/hard drives || Exchanging keys / Signatures
|}

'''The Concept of "Hybrid Encryption"''': Because public-key crypto is slow, we don't use it to encrypt a whole movie. Instead, we use it for 1 second to '''Exchange a Symmetric Key'''. Once both sides have the secret key, they switch to the fast symmetric encryption. Analyzing this "Handshake" is the core of all internet security.
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