@misc{cryptoeprint:2013:489,
    author = {Constantinos Patsakis and Agusti Solanas},
    title = {An Efficient Scheme for Centralized Group Key Management in  Collaborative Environments},
    howpublished = {Cryptology ePrint Archive, Report 2013/489},
    year = {2013},
    url = {https://eprint.iacr.org/2013/489},
}