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,...

We answer the open question of the possibility of building a digital signature scheme with proven security based on the one-wayness of a trapdoor permutation and with signatures as short as possible. Our scheme is provably secure against existential forgery under chosenmessage attacks (with tight reduction) in the ideal cipher model. It is a variant of the construction used in QUARTZ [11], that...

the prevalence of the production of lithographic illustrated versions from the half of 13 century ah caused that painters join to the group of calligraphers and book producers in these workshops and in this way many illustrated versions were produced. in the most of available lithographic illustrated versions from qajar period, if the version has not any missing page from the opening to the end...

Signature verification is most commonly used as an authorization tool from the beginning till now. Many people uses bank cheques for most of their transactions. Although banks are computerized, but still verification process of signature in cheques is done manually which consumes time and even misleads sometimes. Signatures verification process can be done online or off-line depending upon the ...

The appearance of Bitcoin in 2009[Nak09] has enabled the trustless transfer of funds by means of a publically verifiable distributed ledger. However, this ledger exposes all transactions, resulting in extremely poor privacy for Bitcoin users. In this paper, we describe some new technologies that would reduce the amount of publically inferrable information on the Bitcoin blockchain. We start wit...

An original digital signature scheme based on action of infinite ring on module is presented. It is assumed that the ring contains an infinite multiplicative monoid. The ring action is defined as monoid elements's action on the module element as an operator. The signature scheme is based on particularly designed one–way functions (OWFs), using a postulated hard problem in monoid action level. T...

A seminal result in cryptography is that signature schemes can be constructed (in a black-box fashion) from any one-way function. The minimal assumptions needed to construct blind signature schemes, however, have remained unclear. Here, we rule out black-box constructions of blind signature schemes from one-way functions. In fact, we rule out constructions even from a random permutation oracle,...