VISUAL STRUCTURING OF MULTIVARIABLE DATA

Visual structuring of multivariable data sets provided in records which include fields, and are displayed in tabular form. A method comprising: defining a key field; sorting records by defined key field; finding equivalent field values in fields in records arranged adjacent to each other; defining a block for fields having equivalent field values; displaying one field value of fields of a block having equivalent field values and masking all other fields within the block having equivalent field values like the one field value. Facilitating monitoring or analysis of large multivariable data sets provided in records and displayed in tabular form it is proposed to define blocks of fields having equivalent field values and display only one field value of a block. The visual output is useful to identify patterns indicative of an attack. A service provider monitors records provided by a customer and notifies the customer of the attack.