Elliptic curve-based certificateless signature is slowly gaining attention due to its ability to retain the efficiency of identity-based signature to eliminate the need of certificate management while it does not suffer from inherent private key escrow problem. Generally, cryptosystem based on elliptic curve offers equivalent security strength at smaller key sizes compared to conventional crypt...

We introduce a new cryptographic technique that we call universal re-encryption. A conventional cryptosystem that permits re-encryption, such as ElGamal, does so only for a player with knowledge of the public key corresponding to a given ciphertext. In contrast, universal reencryption may be performed without knowledge of public keys. We demonstrate an asymmetric cryptosystem with universal re-...

The purpose of this paper is to submit the NSS lattice based signature scheme for consideration for inclusion in the IEEE P1363.1 standard. At the rump session of CRYPTO ’96 the authors introduced a highly efficient new public key cryptosystem called NTRU. (See [4] for details.) Underlying NTRU is a hard mathematical problem of finding short vectors in certain lattices. In this paper we introdu...

n recent years, public key infrastructure (PKI) has emerged as co-existent with the increasing demand for digital security. A digital signature is created using existing public key cryptography technology. This technology will permit commercial transactions to be carried out across insecure networks without fear of tampering or forgery. The relative strength of digital signatures relies on the ...

In verifiable multi-secret sharing schemes (VMSSs), many secrets can be shared but only one share is kept by each user and this share is verifiable by others. In this paper, we propose two secure, efficient, and verifiable (t, n) multi-secret sharing schemes, namely Scheme-I and Scheme-II. Scheme-I is based on the Lagrange interpolating polynomial and the LFSR-based public key cryptosystem. The...

Public-key cryptography has low infrastructural overhead because public-key users bear a substantial but hidden administrative burden. A public-key security system trusts its users to validate each others' public keys rigorously and to manage their own private keys securely. Both tasks are hard to do well, but publickey security systems lack a centralized infrastructure for enforcing users' dis...

The McEliece cryptosystem is one of the best-known (classical) public-key cryptosystems, which is based on algebraic coding theory. In this paper, we present a quantum analogue of the classical McEliece cryptosystem. Our quantumMcEliece public-key cryptosystem is based on the theory of stabilizer codes and has the key generation, encryption and decryption algorithms similar to those in the clas...

We describe a practical attack on the High Bandwidth Digital Content Protection (HDCP) scheme. HDCP is a proposed identity-based cryptosystem for use over the Digital Visual Interface bus, a consumer video bus used in digital VCRs, camcorders, and personal computers. Public/private key pairs are assigned to devices by a trusted authority, which possesses a master secret. If an attacker can reco...

This paper studies a public key generation in an enhanced ECC (Elliptic Curve Cryptosystem) using FPGA’s at the hardware implementation. To improve the strength of encryption and the speed of processing, the public key and the private key of EC(Elliptic curve) over GF(2n ) are used to form a shared private key (X,Y). And then the X is used with an initial point on HEC(Hyper-Elliptic Curve) over...

This paper proposes a public key generation for an ECC (Elliptic Curve Cryptosystem) using FPGA’s. To improve the strength of encryption and the speed of processing, the public key and the private key of EC(Elliptic curve) over GF(2) are used to form a shared private key (X,Y). And then the X is used with an initial point on HEC(Hyper-Elliptic Curve) over GF(2) to generate session keys, which a...