In the era of growing technology, security is the major concern to avoid fakes and forgeries. There are various biometric technique which help in personal identification, among those verification systems, one system is Signature Verification System, Signature is a behavioral biometric.It is not based on figure print ,retina or any facial expression, according to the data available in the input,...

Multi-proxy signature allows the original signer delegate his singing power to a group of proxy signers. Blind proxy-signature allows the user to obtain a signature of a message from several signers in a way that each signer learns neither the message nor the resulting signature. Plenty of multi-proxy signature and blind multisignature schemes have been proposed under the certificate-based (CA-...

Signature recognition is probably the oldest biometrical identification method, with a high legal acceptance. Verification can be performed either Offline or Online based on the application. Online systems use dynamic information of a signature captured at the time the signature is made. Offline systems work on the scanned image of a signature. We have worked on the Offline Verification of sign...

The subliminal channel in a cryptographic protocol such as an authentication system or a signature scheme provides an additional channel from the sender to an authorized receiver and can’t be read by any unauthorized receiver. In this paper, we firstly show that Hess’s ID-Based signature scheme in SAC’02 can provide digital signature with the broadband and narrowband subliminal channels. Second...

A proxy signature scheme allows an entity to delegate its signing power to another entity. Since the notion of proxy signatures was first introduced, many proxy signature schemes and various extensions have been considered. As an example, the notion of threshold proxy signature or proxy multi-signature was introduced as a group-oriented variant. In this paper, we show that some threshold proxy ...

We introduce the notation of organizational signature. This is a new variant of digital signature, which allows the organization to obtain the signature of any employee not as an individual but through his affiliation. Due to this signature, an organization, e.g. company, can create different signatures related to each position. Elliptic curves discrete logarithm problem (ECDLP) has a low compu...

To implement fair exchange of digital signatures, we need an efficient scheme to commit a digital signature safely to a specific receiver. To satisfy this security requirement in an efficient manner, we introduce a new variant of digital signature called conditional signature which is a specially interpreted signature on a message and a condition together. By imposing a signer-chosen condition ...

This paper deals with an off-line Japanese signature verification using a pattern matching method. An annoying problem encountered in off-line signature verification using a pattern matching is that variation of signature stroke widths and a registered signature selected from a set of reference samples affect the verification performance. In this paper, we propose a modified pattern matching me...

PURPOSE We have previously characterized a tumor stroma expression signature in a subset of breast tumors that correlates with better clinical outcome. The purpose of this study is to determine whether this stromal signature, termed the "DTF fibroblast" (desmoid-type fibromatosis) signature, is specific to breast cancer or is a common stromal response found in different types of cancer. EXPER...

Quantum signature which concerns about the authenticity and non-repudiation of messages on insecure quantum channels is an important research topic in quantum cryptography. So far, a few quantum signature schemes have been proposed. Inspired by entanglement swapping, we first propose a new quantum homomorphic signature scheme which can be used to authenticate data packets of multiple streams fo...