Allison B. Lewko, Brent Waters. Why Proving HIBE Systems Secure is Difficult. IACR Cryptology ePrint Archive, 2013:68, 2013. [doi]
@article{LewkoW13, title = {Why Proving HIBE Systems Secure is Difficult}, author = {Allison B. Lewko and Brent Waters}, year = {2013}, url = {http://eprint.iacr.org/2013/068}, researchr = {https://researchr.org/publication/LewkoW13}, cites = {0}, citedby = {0}, journal = {IACR Cryptology ePrint Archive}, volume = {2013}, pages = {68}, }