Think of a blockchain like a shared notebook that everyone has a copy of. When someone writes something in it, like ‘Alice sent Bob 10 coins’, all the copies update at once, no one can change it later without everyone noticing. That’s why it’s secure.
Examples
- A shared notebook where no one can change what was written before.
- Everyone in the class has a copy of the same homework sheet, if someone changes their copy, everyone knows.
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See also
- How Does a Smartphone Recognize Your Face?
- Why Do We Use Passwords for Security?
- Why Do We Use ‘Barcodes’ on Products and How Do They Work?
- How does the latest generation of brain-computer interfaces function?
- How Did the Internet Begin?
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Categories: Technology · Blockchain,Cryptography,Security