The scope of "information security" is not equal to the scope of "trade secret". Thus, it is essential to identify trade secret so as to establish the corresponding control measure. In addition, If an organization faces a trade secret suit, digital data, with its characteristics of being easily tampered and spread, it is necessary to take measures to assist in identifying and proving the source of data in order to clarify responsibilities. In summary, existing information security practices are probably unable to respond to trade secret risks. How to boost the integrated management of information security and trade secret, and future effectiveness of evidence, are the important issues in digital era.