Security is essential for communication of messages, data, and private information. Security threats and vulnerabilities increases rapidly due to the wide usage of wireless medium for data transmission. The sensitive data and private information transmitted across internet can be accessed and altered by the intruders. The security algorithms are important to ensure the communication of messages without unauthorized access and modification as well as to achieve data security. This proposed work is the development of novel cryptography suitable for encryption of text messages. This proposed algorithm encrypts the input string into ciphertext through series of mathematical operations. The inverse operation of encryption is performed at the receiver to obtain the original string from the ciphertext. This proposed cryptography can be utilized for preventing the theft and fraud in online money transactions, securing the email messages, file encryption, securing the web information, ensuring data confidentiality across internet, assuring data security in remote access, securing the patients information transmitted across wireless networks, enabling secure communication of country’s border information, preventing the credit card fraud, securing the industrial continuous varying process parameters, encryption of whatsapp messages, and securing the individual’s private information.

Internet is widely used for communicating the process data, private information, bank online transactions, patient’s health condition, border’s information, credit and debit card transactions. Intruders try to get access and misuse the private information which leads to loss of original data. Attackers can monitor the online transactions takes place across worldwide. They try to get the account details of individuals, and transfer the money in an unauthorized way. Due to this unauthorized transactions, bank customers losses their amount. Security is essential to maintain the sensitive data, messages, and information secret during transmission across internet. This proposed work is the novel encryption and decryption named PrasathSrinivasan Sushmitha algorithm for String Encryption and Decryption. This proposed algorithm involves series of mathematical operations to convert the input string into ciphertext. This ciphertext can be transmitted through internet across worldwide. Decryption is performed reverse of the encryption to convert the ciphertext into original string. The benefit of this proposed encryption algorithm is simple mathematical operations, and it assures confidentiality of data, private information, and messages. This proposed algorithm can be suitable for usage in wide range of applications including text encryption, securing online transactions of amount and account details, securing email messages, securing medical data related to patients, securing industrial process information, and securing the personal information.

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