Cryptanalysis and Performance Evaluation of Enhanced Threshold Proxy Signature Scheme Based on RSA for Known Signers

Table 2

A comparison of threshold proxy signature schemes based on proxy requirements.

Serial number	Proxy signature scheme/requirements	Kim et al.	Sun et al.	HLL	Wen et al.	Enhanced scheme
1	Secrecy	Yes	Yes	No	No	Yes
2	Proxy protection	No	No	No	No	Yes
3	Unforgeability	Yes	No	No	No	Yes
4	Nonrepudiation	Yes	Yes	No	No	Yes
5	Time-constraint	No	No	Yes	Yes	Yes
6	Known signers	No	Yes	No	No	Yes