Each particle also has a password which allows its properties to be changed, but the cosmic censorship hypothesis suggests we can never observe the password itself—only its secure hash.

"Particle Properties", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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Each particle also has a password which allows its properties to be changed, but the cosmic censorship hypothesis suggests we can never observe the password itself—only its secure hash.