Online Signature Forgery Prevention

An Online Signature Verification System for Forgery and Disguise Detection

Online signatures are acquired using a digital tablet which provides all the trajectory of the signature as well as the variation in pressure with respect to time. Therefore, online signature verification achieves higher recognition rates than offline signature verification. Nowadays, forensic document examiners distinguish between forgeries, in which an impostor tries to imitate a given signat...

Recent Results on Signature Forgery

A weakness has been found in the ISO 9796 signature standard using RSA. The padding method proposed by the standard is the origin of the problem and will require probable changes in ISO 9796 parts 1 and 2. This weakness was discovered by Gemplus’ cryptography division and the ENS and UCL cryptography groups while implementing the standard. A paper reporting the problem will be presented at Cryp...

Forgery Above a Genuine Signature

Rule Based Signature Verification and Forgery Detection

A rule based signature verification system has been devised based on Adaptive Network Based Fuzzy Inference System (ANFIS). The histogram of the angle differences along the signature trajectory is used as a descriptor of the signatures. We partition the histogram to obtain a number of rules, which is limited to 4 at a time. The performance of the proposed system is found to be satisfactory on t...

A Test Tool to Support Brut-force Online and Offline Signature Forgery Tests on Mobile Devices

Testing of biometric systems requires the consideration of aspects beyond technical and statistical parameters. Especially for testing biometric techniques based on behavior, human factors like intention and forgery strength need to be considered. In this paper, a test tool to support skilled forgeries by test subjects is presented for handwriting verification systems. The software tool has bee...