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

Table 16

Comparison of communication overheads of the threshold proxy signature schemes.

Schemes	HLL		KC		Geng		Fengying		Proposed
Number of Communications	PS	PSIV	PS	PSIV	PS	PSIV	PS	PSIV	PS	PSIV
Number of transmissions	𝑛	𝑡	𝑛	𝑡	𝑛	𝑡	𝑛	𝑡	𝑛	𝑡
Number of broadcasts	3	0	3	0	3	0	3	0	3	0
Total	𝑛+𝑡+3		𝑛+𝑡+3		𝑛+𝑡+3		𝑛+𝑡+3		𝑛+𝑡+3

PS: proxy sharing phase.
PSIV: proxy signature issuing and verification phase.