It is possible necessary in practice to accept some tampering of trusted information

this motivates the development of theories of quantitative information integrity aimed at showing that some tampering are small and therefore tolerable.In this paper

we focus on the threat model that an attack will modify the trusted information as much as possible in one try.Based on the information integrity model

we use the min-entropy to quantify the trusted information by modeling a program as a communication channel.We quantify the contamination and the channel suppression in information integrity.We then analyze the relationship between the contamination and the capacity of the channel

and consider the integrity in the cascade of the programs.Finally

we discuss the negative value case in quantitative information integrity.