These days, the affairs of tampering of measurement data are making a sensation.

The data are, "rate of fuel consumption", "nitrogen dioxide contained in automobile exhausts", for example.

We hear the phrase "tampering by software" in these affairs.

To tell you the truth, this phrase is very important to understand these affairs.

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Making "tampering of measurement data" is not difficult indeed.

It is enough to add or subtract a certain value to the measured data(that fails to meet the standard), for example.

For me, I will add a process to multiple the vales to random digits

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However, such tampering is too childish.

Because there is a possibility of easily discovered, just performing such a simple subtraction. when the disclosure instructions of other data (for example, engine emissions rotational speed, fuel mixture ratio) received.

In particular, when watching the time-series data of dynamic characteristic (for example, from idling to acceleration suddenly), some engineers can find this discrepancy easily.

In order to tamper with specified data, You need to tamper with all data including other parts, well-balanced.

However, it is surprisingly difficult to create a group of data that holds such uniformity.

I think it is impossible for only the human brain to make tampering data, in consideration of all the physical dynamics of the motor vehicle.

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In order to create "beautiful" tampering data, it is quicker to make a car in a computer.

It is a "virtual car".

(To be continued)