ABSTRACT
Unlike symmetric key cryptography, it is not mandatory to share any secret key among the parties involved in the secret message exchange. Then the question that may arise in our mind is: How does an asymmetric key ensure secrecy of a message? As mentioned previously, in asymmetric key cryptography, instead of generating a single key (which is usually the case for symmetric key cryptography), it generates a pair of keys. Among them, the public key is publicized and the private key is kept secret. These two keys are mathematically related. Since these keys are generated utilizing a one-way function, it is infeasible to generate a private key after knowing the public key, and vice versa. Again, a message encrypted through a key is not feasible to decrypt utilizing a similar key. Hence, the secrecy of a message is preserved.
