Patent ID: 7185232

Claim:
A method of creating a fault-inducing transaction representation in a network, the method comprising: interjecting a pattern with fault-inducing sub-fields, where the pattern is an expression including a literal string and a wildcard character class, wherein interjecting the pattern comprises at least one of the following: providing alternative character encoding for a character in the expression, providing a double delimiter in the expression, providing all delimiters in the expression, providing no values in the expression, providing a single character and delimiter-value pair in the expression, providing an unbalanced pair in the expression, replacing a delimiter with random ranges that cover the value of the delimiter, providing an alternative encoding to encode a transaction field with a character that is equal in nature and different in representation, providing a prefixed escape in the expression, providing ghost character encoding in the expression, controlling a user identity which is a field indicating resource name or user identity, injecting unfiltered metacharacters to a secondary process, providing extraneous meta-characters for causing misclassification, or parsing out a delimiter to obtain an intermediate representation of the expression, where a value in the expression is replaced by a buffer function; and using the expression to form a subsequent expression that can be used by a target system to detect and trigger on the network at least one transaction that matches the expression.