This invention relates to an online security system serving as a unique and exclusive password generator for every internet transaction.
It is common knowledge that people have to access various websites and, in order to do so, have, in many cases, use passwords which they will have to memories.
The grave risk in the use of such passwords is that they are liable to be "stolen" by unscrupulous persons with dishonest motives. These situations can be of serious concern to genuine users who may stand to lose money and other valuables by such thefts, particularly, when such illegal access is obtained to bank accounts and other valuable sites.

unique and exclusive password generator for every internet transaction, so that the user gets a new password for every online transaction. This new password is something which the user himself will not know about until he actually operates the computer and operates it.
The online security system serving as a password generator for an ongoing transaction only, according to this invention, comprises a transparent card on which alphanumeric characters are printed on a table in different colors; and a computer network, whereby whenever the user of the card logs in to his online account on the network, the image of a grid of the same size as that of the card is displayed on the computer screen, the grid having boxes of different colours , for enabling the user to hold the card against the screen, to overlap the grid on the screen, with the table on the card, such that a set of alphanumeric characters alone on the table, not hidden by the boxes of the grid,

will be visible on the screen as the password for the ongoing transaction only.
This invention incorporates a challenge response mechanism which is a known authentication mechanism by which a challenge is given to the user and a corresponding response is given by the user by way of authentication, as for example, accessing an e-mail account by giving the password.
This invention will now be described with reference to the accompanying drawings which illustrate, by way of example, and not by way of limitation one of possible embodiments of the security card system proposed herein
Fig. 1 illustrating the transparent card C
Fig. 2 illustrating the image of the grid G
appearing on the computer screen
And

Fig. 3 illustrating the card C superimposed on the image of the grid G to reveal password.
Suppose that the user wishes to access his bank account available at a website. The user accesses the website in the usual mariner. However, for accessing his bank account, the computer generates a grid G of boxes of different colours at random appearing on the screen. Next, the user has to obtain his password by superimposing his card C on the image of the grid G on the computer screen. The coloured boxes on the grid match the alphanumerical characters on the card and wherever the colours of the grid boxes are the same as those of the characters on the card, the said characters are not visible, but characters which are not of the same colour as the superimposed boxes are visible.
Thus in Fig. 3 the numeral 967 is visible (while the others are hidden by the same superimposed

Iblours) and this numeral 967 becomes the password for the user to access his bank account.
After the transaction is over, whenever the user wishes to access his bank account again or any other site e.g. his email account, the same procedure is repeated; however, a new password is generated for accessing such account. Thus, in every transaction, a new password unique and exclusive to the user, that is, unique and exclusive to the card is furnished to the user, so much so that even the user will not know what Ins password is going to be until the last moment of access.
The card C will be of convenient size e.g. 6*6, 8*8, and 10*10 cm. of alphanumeric characters printed on a transparent substrate in different colors e.g. black, white, blue, red. Every box in the grid will display randomly assigned alphanumeric characters (single or

' multi-characters).
It will be appreciated that various other embodiments of this invention are possible without departing from the scope and ambit thereof.

We Claim:
1. An online security system sewing as a unique and exclusive password generator for an ongoing internet transaction only, according to this invention, comprises a transparent card on which alphanumeric characters are printed on a table in different colors; and a computer network, whereby whenever the user of the card logs in to his online account on the network, the image of a grid of the same size as that of the card is displayed on the computer screen, the grid having boxes of different colours, for enabling the user to hold the card against the screen, to overlap the grid on the screen, with the table on the card, such that a set of alphanumeric characters alone on the table, not hidden by the boxes of the grid, will be visible on the screen as the password for the ongoing transaction only.

2. An online security system serving as a unique and exclusive password generator for an ongoing internet transaction only substantially as herein described with reference to, and as illustrated in, the accompanying drawings.
Dated this die 2nd day of June 2008