What is an encryption key and its function?
Public key cryptography is a form of cryptography which generally allows users to communicate securely without having prior access to a shared secret key. This is done by using a pair of cryptographic keys, designated as public key and private key, which are related mathematically. In public key cryptography, the private key is kept secret, while the public key may be widely distributed. In a sense, one key “locks” a lock; while the other is required to unlock it. It should not be feasible to deduce the private key of a pair given the public key, and in high quality algorithms no such technique is known. One analogy is that of a locked store front door with a mail slot. The mail slot is exposed and accessible to the public; its location (the street address) is in essence the public key. Anyone knowing the street address can go to the door and drop a written message through the slot. However, only the person who posseses the matching private key, the store owner in this case, can open t
