1. A method for monitoring a data network and identifying potentially malicious or threatening cyber activity, comprising: monitoring and collecting digital hidrosis data from at least one host system, wherein the digital hidrosis data comprises data associated with predetermined system behavioral factors; comparing the digital hidrosis data with reference digital hidrosis data, wherein the reference digital hidrosis data defines normal values and/or a normal range of values for the predetermined system behavioral factors; and determining whether malicious or threatening cyber activity may be present based on the comparison between the digital hidrosis data and the reference digital hidrosis data.