About the informatization object functioning stability assessment in conditions of computer attacks at exponential distribution law of time before the enemy’s impact

Objective. The aim of the study is to develop a mathematical model for assessing stability functioning an informatization object (IO) in conditions computer attacks (CA), assuming that laws distribution random variables before enemy's impact and recovery time are distributed exponentially. Method. Application method discrete Markov processes solve problem IO, which differs from known approaches describe state concept "non-returnable state" introduced, into system can move due exhaustion resource allocated restore its readiness after successful CA. Result . As result research, has been developed allows us build function IO taking account intensity CA flow restoring operability, limitations on resource. Conclusion. application makes it possible quantify by constructing survivability under flows recoveries cannot be assumed stationary ergodic, there also no representative statistics calculating asymptotic estimates stability. A quantitative assessment demand information security management bodies when making decisions ensure protection information, as well justifying requirements operability.