Search in GetElementsByTagName

Question

Here is my Code below, where is need capture workds like CARD/ SSN in GetElementsByTagName

* SensitiveInfo can be any thing like card#, accountHorderCardNumber, PersonSSN or SSN#

I have TWO requirements.

1. I need a function that works like %card% and like %SSN%, in SQL

Dim strSensitiveInfo as string

Dim xml As XmlDocument = New XmlDocument()

xml.LoadXml(strReturn)

For Each ElementoProyecto As XmlElement In xml

Dim EleProyecto As XmlNodeList = ElementoProyecto.GetElementsByTagName("SensitiveInfo")

strSensitiveInfo= If((EleProyecto(0) Is Nothing), "", EleProyecto(0).InnerText)

2. I need to encrypt the value of strSensitiveInfo

Can some one plz help me out on this