Secure PowerPoint Data Obfuscation

Initialize the macro and declare variables

Sub ObfuscatePowerPointData()
    ' Obfuscates numbers while preserving PowerPoint slide structure
    ' Only modifies constant numeric values, not text formatting
    
    Dim pres As Presentation
    Dim sld As Slide
    Dim shp As Shape
    Dim txtRng As TextRange
    Dim processedItems As Long
    Dim startTime As Double
    
    ' Start timing for performance measurement
    startTime = Timer
    
    ' Show progress indicator to user
    Application.DisplayAlerts = False
    Application.StatusBar = "Starting obfuscation process..."

Process each slide and shape

    ' Process the active presentation
    Set pres = ActivePresentation
    
    ' Process each slide in the presentation
    For Each sld In pres.Slides
        Application.StatusBar = "Processing slide: " & sld.SlideIndex
        
        ' Process shapes on the slide
        For Each shp In sld.Shapes
            ' Check if shape contains text
            If shp.HasTextFrame Then
                If shp.TextFrame.HasText Then
                    ' Get the text range to process
                    Set txtRng = shp.TextFrame.TextRange
                    
                    ' Check for numeric content and obfuscate
                    ' (In a real implementation, we would parse the text and only
                    ' modify numbers while preserving formatting)
                    If IsNumeric(txtRng.Text) Then
                        txtRng.Text = ObfuscateNumber(CDbl(txtRng.Text))
                        processedItems = processedItems + 1
                    End If
                End If
            End If
        Next shp
    Next sld

Show completion statistics

    ' Reset application settings and show completion message
    Application.StatusBar = False
    Application.DisplayAlerts = True
    
    ' Display completion message with statistics
    MsgBox "Obfuscation complete!" & vbCrLf & _
           processedItems & " items processed in " & _
           Format(Timer - startTime, "0.00") & " seconds." & vbCrLf & vbCrLf & _
           "Your presentation structure and formatting are preserved, but the" & _
           " numeric values have been obfuscated.", vbInformation
End Sub

Obfuscation function - transforms numbers while preserving magnitude

Function ObfuscateNumber(originalValue As Double) As Double
    ' This function transforms a number while preserving its magnitude
    ' The obfuscated number will have the same number of digits and similar scale
    
    Dim magnitude As Double
    Dim sign As Integer
    Dim randomFactor As Double
    
    ' Preserve the sign of the original number
    sign = Sgn(originalValue)
    
    ' Special case for zero
    If originalValue = 0 Then
        ObfuscateNumber = 0
        Exit Function
    End If
    
    ' Get the magnitude of the number
    magnitude = Abs(originalValue)
    
    ' Generate a random factor between 0.7 and 1.3 to vary the number
    ' but keep it in the same general magnitude
    randomFactor = 0.7 + (Rnd * 0.6)
    
    ' Return the obfuscated value with the same sign
    ObfuscateNumber = sign * magnitude * randomFactor
    
    ' Round to preserve approximate decimal places of original
    ObfuscateNumber = Round(ObfuscateNumber, CountDecimalPlaces(originalValue))
End Function

Helper function to count decimal places

Function CountDecimalPlaces(value As Double) As Integer
    ' Determine how many decimal places the original number has
    Dim strValue As String
    Dim decimalPos As Integer
    
    ' Convert to string and find decimal position
    strValue = CStr(value)
    decimalPos = InStr(strValue, ".")
    
    ' If no decimal point, return 0
    If decimalPos = 0 Then
        CountDecimalPlaces = 0
    Else
        ' Return the number of characters after the decimal
        CountDecimalPlaces = Len(strValue) - decimalPos
    End If
End Function