Dec 11

Seminar: Rajeev Anand Sahu “Strong Designated Verifier Signcryption” (Dec 12, 2018)

Dec 12, 2018 – 13.00 – room P.2NO8.08

Speaker: Rajeev Anand Sahu (ULB)

Title: “Strong Designated Verifier Signcryption”
Short abstract: “Recall two important cryptographic primitives: Strong designated verifier signature
(SDVS), which can be verified only by the designated receiver, and Signcryption, which is a hybrid cryptographic primitive that offers functionality of both digital signature and encryption in a single phase. Signcryption is useful for electronic transactions where authentication and privacy both are desired together, for example in secure routing, multi-cast key distribution etc. However, in a usual SDVS, the message is always sent with the signature, which is not desired for classified messages. Instead, to ensure the confidentiality of the message an encryption can be used. On the other hand in a signcryption scheme a designated authentication may require for special needs. To address this issue, we combine these two primitives SDVS and Signcryption, and propose a condensed construction of strong designated verifier signcryption (SDVSigncryption) scheme. The protocol enjoys all properties of the individual primitives. The scheme uses functionalities of bilinear pairing and has been designed on the identity-based setting to avoid key management overhead. Security of the scheme has been realized over the standard assumption, the hardness of computational bilinear Diffie-Hellman problem (CBDHP).”