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.).

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.