The Process of Encryption and Decryption is performed by using Symmetric key cryptography and public key cryptography for Secure Communication. In this paper, we studied that how the process of Encryption and Decryption is perform in case of Symmetric key and public key cryptography using AES and DES algorithms and modified RSA algorithm.

One of the key points of success in high performance computation using an FPGA is the efficient usage of DSP slices and block RAMs in it. This paper presents a FDFM (Few DSP slices and Few block RAMs) processor core approach for implementing RSA encryption. In our approach, an efficient hardware algorithm for Chinese Remainder Theorem (CRT) based RSA decryption using Montgomery multiplication a...

A hidden vector encryption scheme (HVE) is a derivation of identity-based encryption, where the public key is actually a vector over a certain alphabet. The decryption key is also derived from such a vector, but this one is also allowed to have “?” (or wildcard) entries. Decryption is possible as long as these tuples agree on every position except where a “?” occurs. These schemes are useful fo...

We provide methods for transforming an encryption scheme susceptible to decryption errors into one that is immune to these errors. Immunity to decryption errors is vital when constructing nonmalleable and chosen ciphertext secure encryption schemes via current techniques; in addition, it may help defend against certain cryptanalytic techniques, such as the attack of Proos [36] on the NTRU schem...

It is not hard to predict that AES algorithm will play an important role in information security field for a long time in the future after Rijndael algorithm was announced as advanced encryption standard. Hardware implementation based on FPGA of AES algorithm has the advantages of fast, flexible, short development cycle, etc. Hardware implementation based on FPGA of AES encryption and decryptio...

Attribute-based encryption allow user to encrypt data using public-key then it decrypt data using private-key in the cloud. ABE provide the public-key one-to-many encryption. Access polices and user attributes are associated with private keys and ciphertexts. The drawbacks of the existing ABE schemes are that decryption involves expensive pairing operations, the number of such operations grows ...

In ACM CCS 2008, Boldyreva et al. proposed an elegant way of achieving an Identity-based Encryption (IBE) with efficient revocation, which we call revocable IBE (RIBE). One of the significant benefit of their construction is scalability, where the overhead of the trusted authority is logarithmically increased in the number of users, whereas that in the Boneh-Franklin naive revocation way is lin...