Broadcast encryption schemes allow a message sender to broadcast an encrypted data so that only legitimate receivers decrypt it. Because of the intrinsic nature of one-to-many communication in broadcasting, transmission length may be of major concern. Several broadcast encryption schemes with good transmission overhead have been proposed. But, these broadcast encryption schemes are not practica...

We propose an adaptively secure broadcast encryption scheme with short ciphertexts, where the size of broadcast encryption message is fixed regardless of the size of the broadcast group. In our proposed scheme, members can join and leave the group without requiring any change to public parameters of the system or private keys of existing members. Our construction has a twofold improvement over ...

A family of novel broadcast encryption schemes based on probabilistic key pre-distribution are proposed, that enable multiple sources to broadcast secrets, without the use of asymmetric cryptographic primitives. A comprehensive analysis of their efficiencies and performance bounds are presented. The paper also suggests a framework for applications of broadcast encryption, depending on 1) the re...

Broadcast encryption is an interesting application of cryptography which allows one to broadcast a secret to a changing group of intended recipients in such a way that no one outside this group can view the secret. Interest in using broadcast encryption techniques has grown considerably in recent years and such techniques have been integrated in many applications and technologies such as virtua...

An adaptively secure identity-based broadcast encryption system featuring constant sized ciphertext is introduced. The size of public key and private keys of the system are both linear in the maximum number of receivers. The system is fully collusion-resistant and has stateless receivers. Here, in the system CAST algorithm is used for encryption of the broadcast message. The scheme is well opti...

We introduce new theoretical measures for the qualitative and quantitative assessment of encryption schemes designed for broadcast transmissions. The goal is to allow a central broadcast site to broadcast secure transmissions to an arbitrary set of recipients while minimizing key management related transmissions. We present several schemes that allow a center to broadcast a secret to any subset...

Our system consists of a center and a set, U of n users. The center provides keys to the users when they join the system. Later on, the center wants to broadcast an encrypted message (such as the password to view “Matrix”) which can be deciphered only by a dynamically changing privileged subset of users, T , i.e., the non-privileged users should not be able to learn the message. To achieve this...

Abstract. Broadcast Encryption allows a center to broadcast encrypted messages to a set of users so that only privileged users can decrypt them. In this paper, we propose an efficient broadcast encryption scheme based on the “Subset Difference” (SD) scheme. It reduces the transmission overhead by 50 percent while the storage overhead remains the same but the computational overhead somewhat incr...

Broadcast encryption schemes rely on a centralized authority to generate decryption keys for each user. It is observed that, when a broadcast encryption scheme is deployed for secret escrows, a dishonest dealer can read the escrowed secrets without leaving any witnesses. We present a new broadcast encryption paradigm referred to as fully distributed broadcast encryption (FDBE) without suffering...