TY - JOUR
AU1 - Uzunkol, Osmanbey
AB - Ren and Jiang recently published a “verifiable outsourced attribute-based signature scheme” in Multimedia Tools and Applications. In this note, we first provide two attacks on the verifiability of the semi-signatures of this scheme by showing that a malicious signing-cloud service provider (S-CSP) can always cheat the signer unlike the authors’ claim. Moreover, one of these attacks also implies that an untrusted S-CSP can always forge signatures contrary to the claimed unforgeability against chosen message attacks. Therefore, this scheme unfortunately does not satisfy the main security properties for a delegated signature scheme.
TI - Comments on “verifiable outsourced attribute-based signature scheme”
JF - Multimedia Tools and Applications
DO - 10.1007/s11042-018-6725-7
DA - 2018-10-03
UR - https://www.deepdyve.com/lp/springer-journals/comments-on-verifiable-outsourced-attribute-based-signature-scheme-QLBdRWhFwn
SP - 11735
EP - 11742
VL - 78
IS - 9
DP - DeepDyve
ER -