In this paper, a novel portable hard-disk encryption/decryption system with a MEMS coded lock is presented, which can authenticate the user and provide the key for the AES encryption/decryption module. The portable hard-disk encryption/decryption system is composed of the authentication module, the USB portable hard-disk interface card, the ATA protocol command decoder module, the data encrypti...

Several schemes have been proposed towards the fast encryption and decryption in RSA and its variants. One popular idea is to use integers having low Hamming weight in the preparation of the decryption exponents. This is to reduce the multiplication effort in the square and multiply method in the exponentiation routine, both in encryption and decryption. In this paper we show that such schemes ...

A cryptographic contract and enforcement technology would guarantee release of a data decryption key to an authorized party if and only if predetermined contract requirements are satisfied. Threshold secret sharing can be used to eliminate the need for access to the hidden key under normal circumstances. It can also eliminate the liability and burden normally carried by device manufacturers or ...

As more sensitive data is shared and stored by third-party sites on the internet, there will be a need to encrypt data stored at these sites. One drawback of encrypting data is that it can be selectively shared only at a coarse-grained level. Attribute based encryption is a public-key-based one-to-many encryption that allows users to encrypt and decrypt data based on user attributes. A promisin...

Many improvements have been made since the RSA origin in terms of encryption/decryption speed and memory saving. This paper concentrates on the performance improvement. Rebalanced RSA is designed to improve the decryption speed at the cost of encryption speed. Further work was done to improve its encryption speed in terms of rebalanced Chinese Remainder Theorem (CRT) variants. Rebalanced CRT va...

At Crypto’07, Goyal introduced the concept of Accountable Authority Identity-Based Encryption as a convenient tool to reduce the amount of trust in authorities in Identity-Based Encryption. In this model, if the Private Key Generator (PKG) maliciously re-distributes users’ decryption keys, it runs the risk of being caught and prosecuted. Goyal proposed two constructions: the first one is effici...

In these days, Security is necessary for all the applications on the network. Number of mechanisms is used for the purpose of providing the security to many applications. But for the N-Tier architecture there is no such type of mechanism is implemented for security till now. N-tier architecture has number of levels or tier, and for each tier security is essential. For providing the security to ...

A searchable public key encryption (PEKS) scheme allows to generate, for any given message W , a trapdoor TW , such that TW allows to check whether a given ciphertext is an encryption ofW or not. Of course, TW should not reveal any additional information about the plaintext. PEKS schemes have interesting applications: for instance, consider an email gateway that wants to prioritize or filter en...

In this work, we introduce a new, efficient and practical scheme based on the Rabin cryptosystem without using the Jacobi symbol, message redundancy technique or the needs of extra bits in order to specify the correct plaintext. Our system involves only a single prime number as the decryption key and does only one modular exponentiation. Consequently, this will practically reduce the computatio...

We perform a numerical analysis of the double random phase encryption-decryption technique to determine how, in the case of both amplitude and phase encoding, the two decryption keys (the image- and Fourier-plane keys) affect the output gray-scale image when they are in error. We perform perfect encryption and imperfect decryption. We introduce errors into the decrypting keys that correspond to...