# What is the full form of RSA

RSA: RSA stands for Rivest, Shamir, Adleman. They are the inventors of public-key encryption technology, which is a public-key cryptosystem for secure data transmission. It is a standard encryption method for transmitting sensitive data, especially while transferring data over the internet. This public key encryption technology developed by RSA Data Security Inc. Encrypting a message means that code is added to the message which converts it into a random mess. The RSA algorithm is based on the difficulty involved in the factorization of large numbers. The RSA algorithm is based on the fact that there is no efficient way to factor very large numbers. So, deducing an RSA key would take a huge amount of time and processing power.

RSA algorithm is asymmetric cryptography algorithm as it works on two different keys; public key and private key. The public key is given to everyone, and private key remains private. The public key comprises two numbers, one of which is a multiplication of two large prime numbers.

Furthermore, the private key is also derived from the same two prime numbers. So, the security of private key can only be compromised if one can factorize the large number, which is not so easy. So, the strength of the encryption depends on the key size; the large keys increases the strength of encryption tremendously. RSA keys can be 1024 or 2048 bits long.

For example, if you can share the code with your friend beforehand, either of you can send an encrypted message to each other at any time, knowing that only you two can read this message. But what if you could not share the code beforehand?

To solve this issue related to cryptography, the public-key encryption scheme, which is also known as asymmetric encryption, was developed. So, this technology was developed to solve one of the biggest problems in cryptography, how to send a coded message to someone without previously sharing the code with them.

In RSA encryption, a message is encrypted with a code called a public key, which does not need to be hidden. Based on the mathematical properties of the RSA algorithm, once a message has been encrypted with the public key, it can only be decrypted by another key, which is called the private key. So, a pair of key, which are public and private keys, is required to read such messages.

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