1. A thin film transistor array panel for a liquid crystal display comprising:
a substrate;
a color filter on the substrate;
a gate line formed on the substrate;
a data line formed on the substrate and insulated from the gate line;
a thin film transistor formed on the substrate and connected to the gate line and the data line;
a pixel electrode connected to the thin film transistor;
a black matrix on the substrate;
a common wire formed with the same layer as the black matrix and comprising a common signal line and a common pad connected to the common signal line,
wherein the color filter extends along the data line, and wherein the common pad transmits a common signal to the common signal line from an external circuit and the common signal line transmits the common signal to a common electrode opposing the pixel electrode.
2. The thin film transistor array panel of claim 1, wherein the black matrix has an opening on the pixel electrode.
3. The thin film transistor array panel of claim 2, further comprising an align key formed with the same layer as the black matrix or the color filter.
4. The thin film transistor array panel of claim 2, further comprising:
a gate pad that is connected to a first external circuit, receives a gate signal from the first external circuit, and transmits the gate signal to the gate line; and
a data pad that is connected to a second external circuit, receives a data signal from the second external circuit, and transmits the data signal to the data line,
wherein the gate pad or the data pad are formed with the same layer as the black matrix.
5. The thin film transistor array panel of claim 4, further comprising:
a redundant gate pad made of a same layer as the pixel electrode and connected to the gate pad; and
a redundant data pad made of a same layer as the pixel electrode and connected to the data pad.
6. The thin film transistor array panel of claim 5, further comprising:
a first insulator disposed between the black matrix and the gate line and having a contact hole to connect the gate pad to the gate line; and
a second insulator disposed between the black matrix and the data line and having a contact hole to connect the data pad to the data line.
7. The thin film transistor array panel of claim 2, wherein an edge of the color filter overlaps the black matrix.
8. The thin film transistor array panel of claim 2, further comprising an organic insulating layer disposed on the black matrix and the color filter and under the gate line, the data line, the thin film transistor, and the pixel electrode.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of securely sending a multi-character password from an authorized access device to an authentication device having a plurality of assigned addresses, said method comprising:
in the access device:
dividing a multi-character password into a plurality of password data segments;
placing each of said password data segments in a different one of a plurality of password packets, wherein each of the password packets is addressed to a different one of the plurality of addresses assigned to the authentication device; and
sending the plurality of password packets from the access device to the plurality of addresses assigned to the authentication device;
in the authentication device:
receiving the plurality of password packets from the access device;
associating the plurality of password packets as related packets;
extracting the password data segments from the plurality of related password packets; and
assembling the multi-character password from the extracted password data segments.
2. The method of password division multiplexing according to claim 1, wherein the step of associating the plurality of password packets in the authentication device includes associating as related packets, packets that have the same source address.
3. The method of password division multiplexing according to claim 1, wherein the step of sending the plurality of password packets from the access device to the plurality of addresses assigned to the authentication device includes:
transmitting a first password packet from the access device to a first address assigned to the authentication device; and
individually transmitting each of the remaining password packets separated in time from a preceding password packet by a predefined time interval.
4. The method of password division multiplexing according to claim 3, wherein the step of assembling the multi-character password in the authentication device includes assembling the extracted password data segments in the order in which they were received.
5. The method of password division multiplexing according to claim 4, further comprising verifying in the authentication device that the assembled password matches a stored password for the access device.
6. The method of password division multiplexing according to claim 5, wherein the step of verifying in the authentication device that the assembled password matches a stored password for the access device includes:
measuring time intervals separating the different password packets received from the access device; and
verifying that the time intervals separating the different password packets match stored time intervals associated with the access device.
7. The method of password division multiplexing according to claim 5, wherein the step of verifying in the authentication device that the assembled password matches a stored password for the access device also includes verifying that the assembled extracted data segments produce a string of characters matching a stored multi-character password for the access device.
8. The method of password division multiplexing according to claim 5, wherein the step of verifying in the authentication device that the assembled password matches a stored password for the access device also includes verifying that the content of each extracted data segment matches a stored content for the extracted data segment.
9. The method of password division multiplexing according to claim 5, wherein the step of verifying in the authentication device that the assembled password matches a stored password for the access device includes:
verifying that the assembled extracted data segments produce a string of characters matching a stored multi-character password for the access device;
verifying that the content of each extracted data segment matches a stored content for the extracted data segment;
measuring time intervals separating the different password packets received from the access device; and
verifying that the time intervals separating the different password packets match stored time intervals for the access device.
10. A method of securely sending a password from an access device to an authentication device having a plurality of assigned addresses known to the access device, said method comprising:
generating by the access device, at least three password packets containing the password of the access device, wherein each of the at least three password packets includes an identifier for the access device and a destination address matching a different one of the plurality of addresses assigned to the authentication device;
sending the at least three password packets to the authentication device;
utilizing the identifier by the authentication device to associate the at least three password packets;
analyzing the at least three password packets at the authentication device to determine whether a predefined characteristic of the password packets is different in one of the password packets;
if the predefined characteristic is different in one of the password packets:
determining whether the password in the remaining packets matches a stored password for the access device identified by the identifier in the remaining packets; and
if the password in the remaining packets matches the stored password for the access device identified by the identifier, sending an access authorization to the access device identified by the identifier in the remaining packets.
11. The method of securely sending a password according to claim 10, wherein the predefined characteristic of the password packets is a source address.
12. The method of securely sending a password according to claim 10, wherein the at least three password packets are sent near-simultaneously, and the predefined characteristic of the password packets is a time of reception at the authentication device.
13. The method of securely sending a password according to claim 10, wherein the at least three password packets are sent near-simultaneously, and the predefined characteristic of the password packets is a time stamp placed on each packet by the access device at the time of transmission.
14. A method in an authentication device of providing an access device with access to protected information, wherein the authentication device has a plurality of assigned addresses which are known to authorized access devices but not to others, said method comprising:
receiving a password from the access device at a first assigned address;
verifying the password;
sending to the access device, an index value identifying a second address from the plurality of addresses; and
providing the access device with access to the protected information only if the access device requests access through the second address.
15. A system for securely sending a password from an access device to an authentication device, said system comprising:
an address pool comprising a plurality of addresses assigned to the authentication device;
an indexed database in the access device populated with the plurality of addresses assigned to the authentication device; and
means within the access device for sending at least a portion of a password to multiple addresses selected from the plurality of addresses assigned to the authentication device.
16. The system according to claim 15, wherein the means within the access device for sending at least a portion of a password to multiple addresses includes:
means for dividing a multi-character password into a plurality of password data segments;
means for placing each of said password data segments in a different one of a plurality of password packets, wherein each of the password packets is addressed to a different one of the plurality of addresses assigned to the authentication device; and
means for sending the plurality of password packets from the access device to the plurality of addresses assigned to the authentication device.
17. The system according to claim 16, wherein the authentication device includes:
means for receiving the plurality of password packets from the access device;
means for associating the plurality of password packets as related packets;
means for extracting the password data segments from the plurality of related password packets; and
means for assembling the multi-character password from the extracted password data segments.
18. The system according to claim 15, wherein the means within the access device for sending at least a portion of a password to multiple addresses includes:
means for generating at least three password packets containing the password of the access device, wherein each of the at least three password packets includes an identifier for the access device and a destination address matching a different one of the plurality of addresses assigned to the authentication device; and
means for sending the at least three password packets to the authentication device.
19. The system according to claim 18, wherein the authentication device includes:
means for utilizing the identifier to associate the at least three password packets as related packets;
means for analyzing the at least three password packets to determine whether a predefined characteristic of the password packets is different in one of the password packets;
means, responsive to a determination that the predefined characteristic is different in one of the password packets, for determining whether the password in the remaining packets matches a stored password for the access device identified by the identifier in the remaining packets; and
means, responsive to a determination that the password in the remaining packets matches the stored password for the identified access device, for sending an access authorization to the access device identified by the identifier in the remaining packets.
20. The system according to claim 18, wherein the authentication device includes:
means for receiving a password from the access device at a first assigned address;
means for determining whether the received password matches a stored password for the access device;
means, responsive to a determination that the received password matches a stored password for the access device, for sending to the access device, an index value identifying a second address from the plurality of addresses assigned to the authentication device; and
means for providing the access device with access to protected information only if the access device requests access through the second address.
21. A system for securely sending a password from an access device to an authentication device, said system comprising:
means for dividing a multi-character password into a plurality of password data segments;
means for placing each of said password data segments in a different one of a plurality of password packets; and
means for sending the plurality of password packets on a plurality of paths through a data network to the authentication device, said data sending means including means for forcing each of the plurality of password packets to follow a different path through the data network.
22. The system according to claim 21, wherein the data network includes a plurality of intermediate nodes through which the plurality of paths pass, each of said nodes having a plurality of output ports, and the means for forcing each of the plurality of password packets to follow a different path through the data network includes:
a routing table in each node associating a destination address of the authentication device with an output port; and
logic for determining that a packet received in the intermediate node includes the destination address of the authentication device, and in response thereto, for transmitting the packet through the output port indicated by the routing table.
23. The system according to claim 21, wherein the data network includes a plurality of intermediate nodes through which the plurality of paths pass, and the means for forcing each of the plurality of password packets to follow a different path through the data network includes:
an encapsulation frame for encapsulating each password packet and the addresses of any intermediate nodes in the desired path for the packet;
means within each intermediate node for stripping off a header of the encapsulation frame and reading the next destination address contained within the frame; and
means for transmitting the packet to the next destination address until the packet arrives at the authentication device.