= Problem Statement

The problem of log verification can be devided in sub-problems. The concept of correlation is introduced in the sub-problem 1.1.

== Problem 1

Given a tuple of time series and even series $(t,e)$, establish whether the event series was tampered with.

== Problem 1.1

Given a tuple of time series and even series $(t,e)$, compute a correlation coefficient presenting a monotonic relationship with the number of changes applied to the event series.

== Problem 1.2

Given a set of correlation coefficient computed from known-good $(t,e)$ tuples and a new coefficient computed from an unverified tuple $(t_u,e_u)$, verify whether $e_u$ was tampered with.

= Related Work