Handwriting / Signature

Handwriting recognition, or signature recognition also called Dynamic Signature Verification (DSV) analyses the way a user signs. The signing features such as speed, velocity and pressure exerted by a hand holding a pen are as important as the static shape of the finished signature.
La reconnaissance de l'écriture, ou plutôt de la signature, parfois appelée vérification dynamique de la signature (DSV en anglais) consiste à analyser la manière de signer (manuellement). Les caractéristiques telles que la vitesse, vélocité et pression exercées par la main tenant le stylo sont aussi importantes que le dessin de la signature.

Required material starts from a simple scanner (in this case, speed & pressure are not available and the recognition accuracy decreases) to the tablet, a video camera, a pen containing sensors or using ultrasonic sensing.
Le matériel utilisé pour capturer la signature peut aller du simple scanner (auquel cas les information de vitesse et de pression ne sont pas disponibles et la reconnaissance est moins efficace) à la tablette, la caméra, au stylo muni de capteurs pouvant utiliser des techniques ultrasoniques.


Here are some links for more technical information:

Comparaison entre deux signatures

Signature sound

(2006) [www.signassured.com] SignAssured proposed SignHear, where recognition is performed by listening to the sound produced when signing.

  • SignHear Signature Verification Device

  • Graphic password

    (2006) Applied Neural Technologies (ANT) proposed a graphic password, called [www.sign4sure.com (dead link)] Sign4Sure. You have to draw over a known image a secret graphic: the way you are making your drawing combined with the location makes the password.

    Also proposed to sign with the mouse (which is already proposed).





    Many papers exist about graphical passwords. Search the web!

    ANT graphic password

    Commercial products:

    (this is an old collection, most links are dead)


  • Alphatek JustSign
  • Cyber-SIGN PenOp
  • CIC Communication Intelligence Corp.
  • "The power to sign online"

  • SiVault uses CIC software.
  • Datavision
  • "Automate Signature Verification Software Since 1982"

  • Diotek DioPass
  • Dynasig Bio-Pen
  • Also sold by Secure Signature Systems in UK.
  • Interlink electronics e-Pad
  • Signotec Pen-Pad
  • Neotel proposes to use ideograms (KRYPTOxxxx).
  • (2006) Neotel International SignHere™
  • Neotel Ideogram. Click to enlarge Neotel SignHere
  • Security Biometrics PenFlow
  • SoftPro SignPlus
  • "The signature professionals"

  • SiVault Systems SiForms
  • SiVault SiForms
  • SQN banking system Sentry: signature
  • "The first and most trusted name in signature verification"

  • Topaz systems SignatureGem pads...
  • "The first and most trusted name in signature verification"

    Topaz SignatureGem T-S261 Topaz SignatureGem T-S711
  • Crypto Sign from Transaction Security PDA-Protect
  • "Biometric Software for the Mobile Work Force"

  • Valyd (formerly Adeptek) e-Sign
  • WonderNet PenFlow, PDALok
  • SMARTpen
  • "Because your identity is too important TM puisque votre identité est trop importante."
    Wireless pen with built-in sensors (1997).
    Also sold in the past by LCI.

  • Grapho-lock
  • "Information security softwares make easy"


  • (2003 May) Interlink Electronics announced the availability of ePad-i.d. — a e-signature and thumbprint input device.
  • (2005) Topaz offers the IDGem series which combine a fingerprint sensor with a signature pad.