ACAFP: Asymmetric Key based Cryptographic Algorithm using Four Prime Numbers to Secure Message Communication. A Review on RSA Algorithm

RSA algorithm is used to hide and retrieve the data in an insecure network environment. The advantage of RSA algorithm is to increase security and accessibility. The private keys never required to be transferred or exposed to everybody. In a shared-key cryptographic system, the secret keys must be shared since exactly the same key is used for encryption and decryption. So there may be a chance that an intruder can find the secret key during the data transmission. There are so many limitations present in RSA algorithm. Various types of attack may be happen in RSA algorithm, like forward search attack, common modulus attack etc. Another disadvantage of using RSA cryptography for encryption is factorization problem and computation speed. In this paper we use a modified RSA cryptosystem algorithm called "Asymmetric key based Cryptographic Algorithm using Four Prime numbers to secure message communication (ACAFP)" to handle four prime numbers and provide security. Four prime numbers are not easily disintegrated and increased the effectiveness throughout the networks.