@inproceedings{GaMa_ACNS19, author = {Daniel Gardham and Mark Manulis}, title = {{Hierarchical Attribute-Based Signatures: Short Keys and Optimal Signature Length}}, booktitle = {Applied Cryptography and Network Security - ACNS 2019}, year = {2019}, series = {LNCS}, volume = {11464}, pages = {89--109}, publisher = {Springer}}