New threshold-proxy threshold-signature schemes
Computers & Electrical Engineering. 2005;31(1):69-80 
Attacks on Self-Certified Multi-Proxy Signature Schemes with Message Recovery
Applied Mechanics and Materials. 2011;135-136:316-320
Security analysis and improvement of some proxy signature schemes
Proceedings of the 3rd international conference on Information security. 2004;27-32
Insider attacks on multi-proxy multi-signature schemes
Computers & Electrical Engineering. 2007;33(2):88-93
ID-based multi-proxy signature, proxy multi-signature and multi-proxy multi-signature schemes from bilinear pairings
Applied Mathematics and Computation. 2005;169(1):437-450
Attacks on threshold signature schemes with traceable signers
Information Processing Letters. 1999;71(1):1-4
Identity-based threshold signature and mediated proxy signature schemes
The Journal of China Universities of Posts and Telecommunications. 2007;14(2):69-74
Self-certified threshold proxy signature schemes with message recovery, nonrepudiation, and traceability
Applied Mathematics and Computation. 2005;164(1):201-225
Analysis of Sun et al.’s linkability attack on some proxy blind signature schemes
Journal of Systems and Software. 2006;79(2):176-179
On the security of some proxy blind signature schemes
Journal of Systems and Software. 2005;74(3):297-302