The first dynamic threshold decryption scheme from pairing is presented. It is secure in groups equipped with a bilinear map, and caters to some important requirements in real application; including the needs to renew the master key, or to add/remove or update a decryption sever, without leaking any information on the master key and changing other decryption servers’ secret keys.

The paper introduces a new algorithm for encryption and decryption. The process of substitution and genetic function is the core of the algorithm. With the use of the below mentioned method encryption or decryption of a message would be done in a new way. KeywordsBlock Division, Decryption, Encryption, Genetic Function, Key, Substitution.

For all current adaptive chosen ciphertext(CCA) secure public key encryption schemes in standard model there are two operations in the decryption algorithm, “validity check” and decryption. The decryption algorithm returns the corresponding plaintext if the ciphertext is valid otherwise it returns a rejection symbol ⊥. We call this paradigm “invalid ciphertext rejection”. However the “validity ...

Attribute-based encryption (ABE) is a popular cryptographic technology to protect the security of users' data in cloud computing. In order to reduce its decryption cost, outsourcing the decryption of ciphertexts is an available method, which enables users to outsource a large number of decryption operations to the cloud service provider. To guarantee the correctness of transformed ciphertexts c...

The multimedia content protection has become a boon for an IT industry nowadays. This scheme is based on layered encryption/decryption involving biometric authentication. Utilization of fingerprints as keys in encryption/decryption procedures eliminates the feasibility of illegal key sharing, which hampers the content protection schemes based solely on traditional keys. The computation times re...

Cryptographic check values (digital signatures, MACs and H-MACs) are useful only if they are free of errors. For that reason all of errors in cryptographic check values should be corrected after the transmission over a noisy channel before their verification is performed. Soft Input Decryption is a method of combining SISO convolutional decoding and decrypting of cryptographic check values to i...

We propose a method for secure wireless transmission of encrypted information. By use of an encryption key, an image or document is optically encrypted by optical heterodyne scanning and hence encryption is performed on the fly. We call this technique optical scanning cryptography. The output of the heterodyne encrypted signal is at radio frequency and can be directly sent through an antenna to...