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PAT REC 3266 25 July 2003 Disk used ARTICLE IN PRESS No. of Pages 9, DID 4.3.1 Pattern Recognition Letters xxx (2003) xxx?xxx www.elsevier.com/locate/patrec Online signature verification using a new

In functional signatures' verification, each of the two functions of the signatures should be known to the signature verifier, but in parametric signatures' verification, the signature verification tool must be able to identify signatures and signatures systems. The two signatures can be generated simultaneously by a known (usually a signature system) with the signatures' system parameters and the signature generation tool. This method is implemented as a two stage verification protocol, first for two signature systems. Next, the validation tool can apply the parameters to the second system and compare the outputs. The two systems are separated by a gap of less than 50% between the signatures. The two signatures are compared using a statistical test. For each of the two test conditions, a set of four random inputs to each system is generated using a known signature system with the known (in some form, e.g., digital signature, signature on a physical document) signatures systems parameters. The validation tool determines the random outputs (by chance) based on the two signature test conditions and the test distribution. If the random outputs are “different” from those calculated for the two test conditions, the signatures are deemed untrustworthy. A simple (in practice very complex) verification protocol for parametric signatures is described. The protocol relies on the known parameters of the signature system: the entropy of each letter, the number of steps taken (in the signature generation process) during the creation of a signature, the “distinguished” of each letter and the “unique” signature system. An example, using EC DSA signatures, is shown. The procedure of verifying two signatures, using a parametric approach, is demonstrated. Results for two systems were evaluated with a statistical test. The number of random outputs obtained from each individual system was compared. A statistically significant result was reported for both the functional and parametric signatures' verification. Keywords: functional signatures, parametric signatures, signatures systems, EC DSA, differential entropy INTRODUCTION This document describes two proposed verification protocols for the functional signature scheme used by EC DSA, namely the parametric and the functional signatures protocols, respectively. The parametric signature techniques is based on a two-step verification protocol. The first stage consists of two independent signature generation stages which use the same signature generation tool. The second stage consists of using the two signature verification tools; one for functional and one for parametric signatures. Each of the steps is performed for the system identified by the signature system parameter in (D).

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What is online signature verification using?

Online signature verification is using digital technology to analyze and confirm the authenticity and integrity of a signature.

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Anyone who needs to verify the legitimacy of a signature in an online setting.

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The specific process may vary depending on the platform or service being used, but generally, you would upload the document with the signature, provide any relevant identification information, and follow the instructions provided.

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The purpose of online signature verification is to ensure the validity and accuracy of signatures, which is essential for legal and business transactions conducted online.

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The information required for online signature verification may vary, but typically, it would include the signature image or file, any identification information associated with the signer, and any additional details specified by the verifying authority or platform.

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The specific deadline for filing online signature verification in 2023 would depend on the jurisdiction or organization requiring the verification. It is recommended to consult the relevant guidelines or contact the overseeing entity for the exact deadline.

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