Cryptography. A piece of secret information that makes it easy to solve an otherwise very difficult code. Frequently attributive.
| 单词 | θ127193 | 
| 释义 | the mind > mental capacity > knowledge > secrecy, concealment > code, cipher > decoding, deciphering > 			[noun]		 > aid to (1)		 trapdoor1978 Cryptography. A piece of secret information that makes it easy to solve an otherwise very difficult code. Frequently attributive. | 
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