Sensitive Number Finder
About SenF
According to the UTSA Data Classification Standard, Social Security Numbers (SSNs) and Credit Card Numbers (CCNs) represent Category I data, meaning that improper disclosure may result in significant legal or financial harm. Therefore, this data must be protected. We must also ensure that we are aware of the types of data that we possess.
SenF is a fast, portable application (written in Java, easy to run) for finding sensitive numbers. Use this tool to identify files on your system that may have Social Security Numbers (SSNs) or Credit Card Numbers (CCNs).
The SenF application is compatible with both Windows and Macintosh operating systems.
Install and Run SenF for Windows
Install SenF
To install SenF, follow these steps:
- Download the SenF Tool
- To extract the contents of the file, right-click the .zip file and select “Extract All” (Figure 1)
- Files will be extracted to a new folder with the same name as the zip file you downloaded. Click <Browse> if you want to save the file in a specific location (Figure 1.2). You may also place a password on the folder by clicking <Password>.
- Once you have extracted the SenF file, you will see a newly-created folder with the same name as the zip file you downloaded.
Figure 1. Extract Files

Figure 2. Select File Destination
Run SenF
To run SenF, follow these steps:
- Open the extracted SenF folder and double-click the "SeNF.jar" file to open the SenF forecast window (Figure 3).
*You need to have Java JRE1.5 (or greater) installed on your computer to run SenF.
- When the application window appears, click <Browse> and select the "C:\" drive to ensure that you are scanning your entire hard drive.
- Select the <LogFile Options> tab and click <Browse>.
- Select the folder and file name where you would like for your log file to be stored.
- Click <Scan> to begin scanning for SSNs and CCNs.
Figure 3. SenF Forecast Window

Install and Run SenF for Mac
Install SenF
To install SenF, follow these steps:
- Download the SenF Tool
- Click <Open> when prompted (Figure 4).
- The location of the .zip file download depends on your browser settings. If you are using the default settings in Safari, the .zip file will be placed into the Downloads folder in your Finder.
- Double-click the .zip file to extract its contents. A new folder with the same name will appear.
Figure 4. Open SenF File

Run SenF
To run SenF, follow these steps:
- Open the extracted SenF folder and double-click the "SeNF.jar" file to open the SenF forecast window
(Figure 5).
*You need to have Java JRE1.5 (or greater) installed on your computer to run SenF.
- Click <Browse> and select the hard drive (typically under "/Volumes") to ensure you are scanning your entire computer (Figure 6). Click <Choose>.
- Select the <LogFile Options> tab.
- Uncheck "Append to existing" and type in a name for your log file.
- Click <Browse> to select the folder and file name where you would like for your log to be stored. You may change other setup options for your log files.
- Click <Scan> to begin scanning for SSNs and CCNs.
- Click on the appropriate line in the list to view suspected data found by SenF. A new window will appear showing you the parts that SenF believes are sensitive numbers - highlighted in yellow (Figure 7). Alternatively, you may also check your log file.
Figure 7. SenF Analyzer Window

Figure 5. SenF Forecast Window

Figure 6. SenF Root Path Chooser

Delete Sensitive Numbers
Once you have completed a SenF scan, you should see a list of files which are suspected of having SSN or CCN data in the SenF Forecast window (Figure 8).
Figure 8. SenF Analyzer Window

There will most likely be several false positives, so if you are sure that a file does not have SSNs or CCNs, disregard it and move on to the next log.
If you find a file that contains SSNs or CCNs and you do not need it, delete the file that contains the SSN or CCN data.
To delete these files, you will need to make a note of the directory path to the file so that you can locate it by navigating through the hard drive (C:\ for Windows or /Volumes for Mac).
For example, if SenF lists this location "file:/C:/Users/abc123/Desktop/Local/Folder/Document.doc" to possibly contain a SSN or CCN, follow that path within your computer to locate and delete it.
Remember to empty your Recycle/Trash bin after deleting all of this data.
Report Sensitive Numbers
If you find a file that has SSNs and you determine that you will need the file(s), you are required to fill out a Justification for Maintaining Social Security Numbers Form (PDF) to get authorization to have confidential data on your UTSA-owned computer.
Sensitive Numbers on Laptops
If you have sensitive UTSA data on your laptop (this includes SSNs and/or CCNs), you are required to encrypt the data per the Portable Computing Standard. For more information on how to encrypt your laptop, visit the Data Encryption page.
Contact the Information Security Office
If you need assistance installing, running, deleting or reporting sensitive numbers, contact the OIT Security Office.