#### Assertion Skew Factor for `notBefore` Time

This attribute is used to calculate the `notBefore` time of an assertion. For example, if `IssueInstant` is `2002-09024T21:39:49Z`, and `Assertion Skew Factor For notBefore Time` is set to 300 seconds (180 is the default value), the `notBefore` attribute of the conditions element for the assertion would be `2002-09-24T21:34:49Z`.

Note – The total valid duration of an assertion is defined by the values set in both the `Assertion Timeout` and `Assertion Skew Factor For notBefore Time` attributes.