The invention discloses a
data security risk assessment method based on
unsupervised learning, and the method comprises the steps: firstly carrying out the analysis of typical marketing business scenes, such as user behavior portraits, directional activities,
credit analysis, and the like, and obtaining a full-life-cycle security protection demand and a corresponding risk; and establishing an evaluation index set according to
risk factor analysis,
risk index selection and risk grade division. In consideration of low efficiency and limitation that a traditional fuzzy comprehensive evaluation method depends on expert scoring, the
semantic similarity technology based on an improved Transform
encoder is adopted, an interactive attention mechanism is combined, matching scoring of text service data and
risk assessment elements is achieved, and a
risk factor weight vector is effectively provided for the fuzzy comprehensive method. Then, a K-Means + +
algorithm introducing a CLT (Center Limit Theorem) is utilized to optimize selection of a clustering center, unstable and inaccurate results caused by the defect of randomly selecting an initial center point are avoided, and finally,
risk factor clustering is carried out according to the
Euclidean distance. According to the method, the K-Means + + clustering
algorithm introducing the CLT is adopted for
risk assessment of the power
business data to cluster risk factors, the clustering method that subjective and objective combination weight calculation is adopted for weighting the
Euclidean distance is adopted for clustering
instability, and the method can be effectively applied to
safety risk assessment of the power
business data.