This paper is presenting cryptography model of block based cipher technique. This model is divided into two sub model one is encryption model and other is decryption model. Using encryption model, encrypt any type of data like text, image, pdf, audio. Using decryption model, decrypt same data. Due to the simplicity of the proposed model, it is very efficient. This model is also much secured due...

To guard ourselves against a word attack or breach, it is always important to have an awareness of the unremarkably used sorts attacks. The most common type password guessing. Hackers can guess passwords locally remotely using either manually through automated approach. One such Dictionary Attack. A dictionary tries make authentication mechanism fail by sequentially entering each in as trying f...

In this paper a new algorithm for encryption and decryption is introduced. The process of substitution and genetic function is the core of the proposed algorithm. In this encryption technique two keys are required for the encryption or decryption of a message. Input stream will be produced intermediate cipher text on which two stages of crossover will be used in the process of encryption and de...

In 1982, Quisquater and Couvreur proposed an RSA variant, called RSA-CRT, based on the Chinese Remainder Theorem to speed up RSA decryption. In 1990, Wiener suggested another RSA variant, called Rebalanced-RSA, which further speeds up RSA decryption by shifting decryption costs to encryption costs. However, this approach essentially maximizes the encryption time since the public exponent e is g...

In 1982, Quisquater & Couvreur proposed a variant of RSA based on the Chinese Remainder Theorem, called RSA-CRT, to speed up RSA decryption. In 1990, Wiener suggested another variant, called Rebalanced RSA-CRT, which further speeds up RSA decryption by shifting decryption costs to encryption costs. However, this approach essentially maximizes the encryption time since the public exponent e in R...