Which of the following best describes a hash function？（）
- A、An irreversible fast encryption method
- B、A reversible fast encryption method
- C、A reversible value computed from a piece of data and used to detect modifications
- D、An irreversible value computed froma piece of data and used to detect modifications
- E、A table inwhich values are stored for efficient retrieval.
正确答案:D
答案解析:有
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