16. The non-transitory computer-readable-storage medium of claim 15 , further comprising one or more processor-executable instructions that, when executed by the at least one processor, causes the at least one processor to: generate an alphanumerical sequence for authenticating the document, in response to the comparison result indicating that the document comprises the confidential data.
16. The non-transitory computer-readable-storage medium of claim 15 , further comprising one or more processor-executable instructions that, when executed by the at least one processor, causes the at least one processor to: generate an alphanumerical sequence for authenticating the document, in response to the comparison result indicating that the document comprises the confidential data. 17. The non-transitory computer-readable-storage medium of claim 16 , wherein the first signature comprises one of a hash value or a fingerprint.