Can we change our unique ID number?

This week presentation was about leaking personal information. I think subject is very interesting but there is no solution. They just talked about how to prevent your personal information. I wished I would hear some solutions. At discussion part, presenters said we can change our identification number. I thought identification number is my unique number can prove it’s me. So I searched some information. Recently, there are a lot of troubles with online shopping mall or the site most Korean use a lot. This trouble makes our personal information like name, sex, birthday, address, e-mail and phone number leak. In personal information, address, e-mail, phone number could change, but identification number and name can’t change, so this leaking problem is so serious.
Maybe you wonder that answers, we can change our identification number? Yes, it’s possible. But it’s not for your personal information leak. It’s for some people who wrote down their birth wrong. So, if you want to change your ID number because yours leaked. The government won’t approve your asking. There are some peoples who changed their ID number, but they change theirs because they didn’t write down their exact birthday. In conclusion, changing ID number is not one of solutions. This is not option. So, I think most of companies don’t need our personal information. Some might need, but a lot of companies don’t need to have our personal information. So I think one of solutions is we don’t give our personal information and companies don’t take our information. It shouldn’t be necessary, it should be options. But I don’t know. I take a lot of phone call from I don’t know and I think all company have my information. They already have mine.