1 research outputs found
AMOUN: Asymmetric lightweight cryptographic scheme for wireless group communication
Multi-recipient cryptographic schemes provide secure communication, between
one sender and multiple recipients, in a multi-party group. Providing secure
multi-party communication is very challenging, especially in dynamic networks.
Existing multi-recipient cryptographic schemes pose a variety of limitations.
These include high computational overhead for both encryption and decryption,
additional communication overhead and high setup cost due to change in
membership, and collusion among recipients. In order to overcome these
limitations, this paper introduces a novel asymmetric multi-recipient
cryptographic scheme, AMOUN. In the proposed scheme, to better utilize network
resources, the sender transmits a ciphertext containing different messages to
multiple recipients, where each recipient only allowed to retrieve its own
designated message. Security analysis demonstrates that the proposed scheme is
indistinguishable under adaptive chosen plaintext attack. Quantitative analysis
reveals that lightweight AMOUN shows lower average computational cost than both
RSA and Multi-RSA, for both encryption and decryption, even when the key sizes
are four times larger. For a given prime size, in case of encryption, AMOUN
shows 98% and 99% lower average computational cost than RSA and Multi-RSA,
respectively. For decryption, AMOUN shows a performance improvement of 99%
compared to RSA and Multi-RSA