Abstract: A currency genuineness detection system using plurality of opto-electronic sensors with both transmission and reflective (including fluorescence) properties of security documents is developed. Both detection sensing strategies utilise integrated response of the wide optical band sensed under UV visible along with optional near infra red light illumination. A security document is examined under static condition. A window signal signature is thus possible from photodetectors responses for various kinds of documents of different denominations, kinds and country of origin. A programmable technique for checking the genuineness of a security document is possible by feeding a unique code of the currency under examination.

Abstract: A system for automatic detection of authenticity of security documents by measuring reflected components of incident energy in three or more optical wave bands. The system involves the use of UV-visible light source, an optional near infra red light source, photodetectors and associated sensing circuitry. Photoelectric signals generated by photodetectors from the reflected energy received from a security document are used to verify its authenticity under UV-visible along with optional near infra red illumination. The process involves measurement of energy reflected as photoelectric signals from a security document in at least three optical wavebands by suitably located photodetectors with appropriate wave band filters and the electronic signal processing to distinguish between a genuine document from a fake one for ultimate LED indicator display and audio-visual alarms, hence the detection of fake security document.

Abstract: The present invention relates to a method of forming and validating a color-assigned rainbow security hologram of an object, where different parts of the recreated image of the object is presented to a viewer in different pre-chosen or assigned colors such that a novel in-built security verification/identification feature is encrypted/incorporated into these holograms, which can only be read/verified be using an encoded key hologram.

Abstract: A DNA based number system and basic arithmetic operations i.e. addition and subtraction for this have been developed. The method of invention comprises assignment of arbitrary integer values to all DNA bases (A=0, T=1, C=2, G=3), arbitrary assignment of complements of DNA bases (A=G, complement of T=C and vice-versa), representation of integers and real numbers in terms of DNA bases and performing basic arithmetic assignment on DNA based number system. This will find wide application in the area of DNA or other molecular computation devices and processors.

Abstract: DNA is a natural molecular level storage device. Molecular storage devices use each molecule or part of it for storing a character. Thus it is possible to store information million of times than presently used storage devices. For example a JPEG image (i.e. flag of India) having file size of 1981 Bytes can be encrypted using 7924 DNA bases which occupies about 2694.16 nanometers In other words flag of India can be encrypted 8.07×105 times in human genome which comprises 6.4×109 DNA bases and occupy a tiny volume of about 0.02 ?m3. A method for storing information in DNA has been developed which includes software and a set of schemes to encrypt, store and decrypt information in terms of DNA bases. The main advantages of the present method over exiting art is that it addresses complete set of extended ASCII characters set and thereby, encryption of all kind of digital information (text, image, audio etc.).