Check String is encrypted in php

Question

I have a form that on it, I've got information from database. Now I want to check just a record on it and it is : Is it possible that I check the string value of that field and if it was encrypted or not , for response I return true or false !! How can I solve this issue??

Answer 1

检查加密的解密的值是否等效于输入文本

Answer 2

To check if it's encrypted you need the key that has encrypted the value.

SELECT if(AES_DECRYPT(`cloumn`, 'encyrption key...') is null, 'false','true') FROM `table`

If you don't have the key you could maybe try testing a certain language signature (the amount of occurences in the string of certain characters). The type of encryption would be rather difficult to detect.