sking is a powerful and 
fast Data Sanitization option. If numerous special cases must be dealt with then 
masking can be slow, extremely complex to administer and can potentially leave some 
data items inappropriately masked. 
 
 
Technique: Substitution 
 
This technique consists of randomly replacing the contents of a column of data with 
information that looks similar but is completely unrelated to the real details. For 
example, the surnames in a customer database could be sanitized by replacing the re