Raylin Tso Takeshi Okamoto Eiji Okamoto ECDSA-Verifiable Signcryption Scheme with Signature Verification on the Signcrypted Message. 11-24 2007 Inscrypt http://dx.doi.org/10.1007/978-3-540-79499-8_3 conf/cisc/2008 db/conf/cisc/inscrypt2008.html#TsoOO08