National Institute of Advanced Industrial Science and Technology

Yohei Hori

Toshihiro Katashita

Hiroyuki Ota

Shinichi Ouchi

Yongxun Liu

Tetsuji Yasuda

Meishoku Masahara

Kazukuni Kobara

Hanpei Koike

Kenji Toda

Kazuhiko Endo

Tatsuro Maeda

Koichi Fukuda

Toshifumi Irisawa

Yasuhiro Ogasahara

Toshihiro Matsui

Osamu Morikawa

A semiconductor deviceof the present invention includes a front end and back ends A and B, each including a plurality of layers. Further, in the plurality of layers of the back end B, (i) circuits, andhaving a security function are provided in at least one layer having a wiring pitch of 100 nm or more, (ii) a circuit having a security function is provided in at least one wiring layer in M5 or higher level (M5, M6, M7, . . . ), (iii) a circuit having a security function is provided in at least one layer, for which immersion ArF exposure does not need to be used, or (iv) a circuit having a security function is provided in at least one layer that is exposed by using an exposure wavelength of 200 nm or more.

Semiconductor device including circuit having security function

A method and a program capable of controlling an error rate of device-specific information are provided. Provided is the method for controlling an error rate of device-specific information, including a step Sof: inputting each of i (i is an arbitrary natural number) challenges, j times (j is an arbitrary natural number), into a PUF mounted chip; leaving j responses intact (j'=j) or processing j responses into j&#x2032; pieces (0&#x3c;j&#x2032;&#x3c;j); and registering them in the database beforehand in association with each piece of the input data, a step Sof inputting i challenges into the database, a step Sof: reading j&#x2032; responses corresponding to the respective i challenges from the database; concatenating the j&#x2032; responses for each piece of the input data; further concatenating the concatenated data by k&#x2032; repetitions (0&#x3c;k&#x2032;&#x2264;k, and k is an arbitrary natural number, but is a natural number of 2 or more if the i and the j are both 1); obtaining the concatenated (j&#x2032;&#xd7;k&#x2032;) responses for each piece of the input data; and further concatenating them also for different input data to obtain concatenated (i&#xd7;j&#x2032;&#xd7;k&#x2032;) responses and thereby generate reference data, a step Sof: inputting i challenges, k times, for each challenge into the PUF mounted chip; leaving obtained k responses intact as k&#x2032;=k or processing the obtained k responses into k&#x2032; pieces (0&#x3c;k&#x2032;&#x3c;k); concatenating obtained k&#x2032; responses by j&#x2032; repetitions for each response; further concatenating them for all of the k&#x2032; responses; further concatenating concatenated (j&#x2032;&#xd7;k&#x2032;) responses also for different input data; and obtaining concatenated (i&#xd7;j&#x2032;&#xd7;k&#x2032;) responses to generate synthesized output data, and a step Sof deciding whether or not the synthesized output data matches the reference data (specifically, whether a Hamming distance between both data is a threshold value or less), and the method determines whether or not the error rate of the synthesized output data is within a preset range based on the decision result in step S, and changes at least one of i, j, j&#x2032;, k, and k&#x2032; to repeat steps Sto Suntil the error rate falls within the preset range if the error rate is determined not to be within the preset range.

Method for controlling error rate of device-specific information and program for controlling error rate of device-specific information

An image display apparatus for displaying image signals of a form of packets incorporating display position information includes a combination of unit display devices so as to acquire translational objectivity. Each of the unit display devices including a receiving part for receiving image signals, a processing part for dividing input image signals into those falling inside and those falling outside a range for display or those subject to or those not subject to display based on the display position information and serving to process display positions of the image signals falling outside the range for display or not subject to display, an output part for outputting the processed image signals along an axis of translational objectivity to a subsequent unit display device, and a display part for displaying the images falling in the range for display, the image display apparatus displaying the image signals as a whole, with the image signals processed sequentially with the unit display devices.

Image display apparatus

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Tsukuba, Japan

Yohei Hori