On the whole, the RSA algorithm is a good algorithm. An improved key expansion method is proposed to improve the security performance in AES key expansion. Advantages of RSA Algorithm (a) RSA is stronger than any other symmetric key algorithm, and the advantages of the RSA algorithm in cryptography are authenticity and privacy. RSA algorithm three parameters: n, e1, e2 n=p q (p, q is 2 large prime numbers) The number of bits occupied by the binary of n is the length of the secret key. The RSA algorithm was published in 1978. Even though there are lots of articles to discuss about how to break the RSA, but it is still secure today. This d can always be determined (if e was chosen with the restriction described above)—for example with the extended Euclidean algorithm.. Encryption and decryption. It is a kind of very popular and widely application modem cryptosystem in the world. In this study, based on fully research and a deep understanding of the principle of tradition RSA algorithm, the RSA algorithm is implemented in VC environment and analyzes the security of RSA algorithm and its disadvantages. In this paper, the authors would like to introduce a variant attack to RSA. The background of RSA encryption As we mentioned at the start of this article, before public-key encryption, it was a challenge to communicate securely if there hadn’t been a chance to safely exchange keys beforehand. In this algorithm, we try to eliminate the distribution of n which is the large number whose factors if found compromises the RSA algorithm. RSA (Rivest–Shamir–Adleman) is an algorithm used by modern computers to encrypt and decrypt messages. Abstract. A lot of this content is borrowed from The Ohio State University’s CSE 6331 lecture notes , but all the analysis is strictly my own. Under protocols like OpenVPN, TLS handshakes can use the RSA algorithm to exchange keys and establish a secure channel. The algorithm was introduced in the year 1978. Internally, this method works only with numbers (no text), which are between 0 and n.. Encrypting a message m (number) with the public key (n, e) is calculated: . RSA (Rivest–Shamir–Adleman) is an algorithm used by modern computers to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm.Asymmetric means that there are two different keys.This is also called public key cryptography, because one of the keys can be given to anyone.The other key must be kept private. RSA is named after its inventors, Ron Rivest, Adi Shamir, and Len Adleman. Each person needs to generate a pair of keys to communicate using RSA encryption. Abstract: This paper proposed enhancing the RSA algorithm through the use of additional third prime number in the composition of the public and private key. For ease of understanding, the primes p It is an asymmetric cryptographic algorithm.Asymmetric means that there are two different keys.This is also called public key cryptography, because one of the keys can be given to anyone.The other key must be kept private. The disadvantage of the RSA algorithm:-(b) It has got too much computation. RSA is a first successful public key cryptographic algorithm.It is also known as an asymmetric cryptographic algorithm because two different keys are used for encryption and decryption. RSA is named after Rivest, Shamir and Adleman the three inventors of RSA algorithm. E1 and e2 are a pair of related values, e1 can be arbitrarily taken, but e1 and (p-1) (q-1) are required to be homogeneous; (e2 e1)mod((p-1) (q- 1))=1. Regardless, in the following sections, I’ll cover a bit about the number theory behind RSA encryption, and I’ll cover the actual RSA encryption algorithm. Conclusion . 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