MAP20071506673 Ryan, Julie J. C. H. Proportional hazards in information security / Julie J. C. H. Ryan and Daniel J. Ryan Nomparametric methods can be used to analyze failure times and estimate probability distributions for failures of systems due to successful attacks on confidentiality, integrity, and availability in information security. However, such methods do not take full advantage of supplemental information regarding the configurations of systems in an information infrastructure that is usually also available En: Risk analysis : an international journal. - New York and London. - Vol. 25, nº 1, February 2005 ; p. 141-149 1. Seguridad de la información . 2. Análisis de riesgos . 3. Sistemas de información . 4. Tecnología . 5. Protección de la información . 6. Modelos matemáticos . I. Ryan, Daniel J. . II. Título. III. Título: Risk analysis : an international journal.