A Provably Secure Proxy Signcryption Scheme Using Bilinear Pairings

Table 1

Security strength comparison among proxy signcryption schemes.

	LC	WC	DCZ	EA	LWHY	Ours
Resistance to key-compromised attack	Yes	Yes	No	No	Yes	Yes
Public verifiability	Yes	Yes	Yes	No	Yes	Yes
Security proof on confidentiality	No	No	No	No	Yes	Yes
Unforgeability proof on proxy credential	No	No	No	No	No	Yes
Unforgeability proof on proxy signcryption	No	No	No	No	Yes	Yes
Resistance to forgery attacks	Yes	Yes	Yes	Yes	No	Yes