Chapter 172 Final Conclusion

The essence of a coded message is simply altering the information to make it unrecognizable to others.

Simple ones include popular acrostic poems;

Stepping up the difficulty, there is the Caesar cipher;

Further up is the codebook used by telegraphs;

And the pinnacle, symbolizing human technological achievements, computer encryption.

All these things are encompassed within the essence of coded messages.

If they have one thing in common,

—pattern.

To be precise, it is using predetermined rules to unearth what the expressor truly wishes to convey.

The initial letters in acrostic poems, the sequential changes in Caesar cipher, Morse code in telegraphs, algorithms in computer encryption.

No matter what, these codes all follow their own specific patterns.

Or perhaps, the codebook that can accurately decipher their true content.

So, the coded message in my hands...

What is its codebook?