Personal information of the customer of the major learning teaching materials company began to leak.

The reason why I wrote "the major learning teaching materials company" is not for the company's privacy but for the possibility that the company becomes extinct.

Apart from that,

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According to my daughters, their information have leaked absolutely, because they use the company materials.

Their name, school and address.

After five years, if the senior daughter will catch a marriage information magazine, it will be more likely to be caused by this leaking.

Unfortunately, we don't have a method to specify the cause, in principal.

Though we might have to give up the personal information as "a thing leaking out".

I don't give up yet.

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For me, I use a sample method to specify the source of leaking.

For example,

- I input a wrong number of the zip on purpose.

- I exchange Katakata with Hiaragana for the part of my address.

- I use both hankaku and zenkaku character at the same time.

I have used the above way and recorded it diligently. (To tell you the truth, I use another intelligent method, but it is secret.)

So when I watch my address, I can find out which company leak my private information easily.

It is very doubtful whether it becomes the evidence that I can maintain a court.

However, another victim might cry out I make noise in a net. It might be possible that the trust of the company drop on the ground.

Of course, if I open this information in net, a new software that can avoid my traps automatically, appears. But I think that it becomes a big thread for companies and list suppliers.

Modification of the list is always annoying them and difficult. Above all, such a person who try to make trick is supposed to

"Troublesome guy"