Identity-based group-oriented signcryption scheme
Qiuliang Xu · Journal of Communications · 2009
An identity-based group-oriented encryption(IBGSC) scheme was presented to achieve confidentiality and authentication during content distribution.In the newly proposed schemes, both ciphertexts and system parameters were of constant size.A sender could signcrypt a message just by using the receiving group's identity information.Every member in the receiving group needed to keep only one private key and could decrypt the ciphertext and verify the signature independently.The scheme was proved secure under either choose ciphertext attack or choose message attack.