In the recent days transmission of large amount of data through online is very prominent. Security is necessary while transmitting large amount of data. Since the data may belost or hacked at some point of transmission. Normally there are three important factors interms of security. They are key generation, encryption and decryption. There are two types of crypto system namely symmetric cryptosystem and asymmetric cryptosystem. There are many publicly available cryptosystems. It may lead the intruders to view the original message sent by the sender using all the possible keys. In order to provide secure transmission of data, a novel encryption algorithm is proposed by analyzing all the existing algorithms. The existing Rivest–Shamir–Adleman (RSA) and Data encryption standard (DES) algorithm are moulded together rto produce the proposed MRDES encryption algorithm. The performance of the proposed Moulded RSA and DES is higher than the existing encryption algorithms and provides higher data security.