How Were Codes Created?
2025年8月 · GM Kids Series 576 第 453 本图书 · GOS Education Inc.
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A code is a way to protect secrets safely.
The history of codes began with the invention of writing.
Once humans could send messages through writing, they wanted to hide their contents.
They came up with different methods to make sure others could not understand the contents even if they saw it.
Especially during wars, no information was allowed to leak out.
A code is a way to protect secrets safely.
The history of codes began with the invention of writing.
Once humans could send messages through writing, they wanted to hide their contents.
They came up with different methods to make sure others could not understand the contents even if they saw it.
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