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How to Encrypt/Decrypt Selected Cells in Excel?
Handling sensitive data safely is essential, and Excel has built-in tools that let you password-protect individual cells in your spreadsheets. You can protect sensitive data from unauthorised access or unintentional changes by encrypting and decrypting specific cells. This article will take you step-by-step through the process of encrypting and decrypting specific Excel cells. This manual will arm you with the knowledge to maintain the security of your information, whether you need to safeguard bank records, personal data, or any other sensitive data.
Make sure you have a fundamental understanding of Microsoft Excel's features before we start. It will be helpful if you are comfortable using the Excel interface and working with cells, rows, and columns. Make sure that Microsoft Excel is installed on your computer and that it supports the encryption features. Let's begin learning how to encrypt and decrypt specific Excel cells!
Encrypt/Decrypt Selected Cells
Here we will first create a VBA module, then run it to select the range of cells, password, and encrypt or decrypt to complete the task. So let us see a simple process to know how you can encrypt or decrypt selected cells in Excel.
Step 1
Consider an Excel sheet where you have list of items.
First, right-click on the sheet name and select View code to open the VBA application.
Right-click > View Code.
Step 2
Then click on Insert and select Module, then copy the below code into the text box.
Insert > Module > Copy.
Code
Private Function StrToPsd(ByVal Txt As String) As Long
Dim xVal As Long
Dim xCh As Long
Dim xSft1 As Long
Dim xSft2 As Long
Dim I As Integer
Dim xLen As Integer
xLen = Len(Txt)
For I = 1 To xLen
xCh = Asc(Mid$(Txt, I, 1))
xVal = xVal Xor (xCh * 2 ^ xSft1)
xVal = xVal Xor (xCh * 2 ^ xSft2)
xSft1 = (xSft1 + 7) Mod 19
xSft2 = (xSft2 + 13) Mod 23
Next I
StrToPsd = xVal
End Function
Private Function Encryption(ByVal Psd As String, ByVal InTxt As String, Optional ByVal Enc As Boolean = True) As String
Dim xOffset As Long
Dim xLen As Integer
Dim I As Integer
Dim xCh As Integer
Dim xOutTxt As String
xOffset = StrToPsd(Psd)
Rnd -1
Randomize xOffset
xLen = Len(InTxt)
For I = 1 To xLen
xCh = Asc(Mid$(InTxt, I, 1))
If xCh >= 32 And xCh <= 126 Then
xCh = xCh - 32
xOffset = Int((96) * Rnd)
If Enc Then
xCh = ((xCh + xOffset) Mod 95)
Else
xCh = ((xCh - xOffset) Mod 95)
If xCh < 0 Then xCh = xCh + 95
End If
xCh = xCh + 32
xOutTxt = xOutTxt & Chr$(xCh)
End If
Next I
Encryption = xOutTxt
End Function
Sub EncryptionRange()
Dim xRg As Range
Dim xPsd As String
Dim xTxt As String
Dim xEnc As Boolean
Dim xRet As Variant
Dim xCell As Range
On Error Resume Next
xTxt = ActiveWindow.RangeSelection.Address
Set xRg = Application.InputBox("Select a range:", "Encrypt Or Decrypt", xTxt, , , , , 8)
Set xRg = Application.Intersect(xRg, xRg.Worksheet.UsedRange)
If xRg Is Nothing Then Exit Sub
xPsd = InputBox("Enter password:", " Encrypt Or Decrypt ")
If xPsd = "" Then
MsgBox "Password cannot be empty", , " Encrypt Or Decrypt "
Exit Sub
End If
xRet = Application.InputBox("Type 1 to encrypt cell(s);Type 2 to decrypt cell(s)", " Encrypt Or Decrypt ", , , , , , 1)
If TypeName(xRet) = "Boolean" Then Exit Sub
If xRet > 0 Then
xEnc = (xRet Mod 2 = 1)
For Each xCell In xRg
If xCell.Value <> "" Then
xCell.Value = Encryption(xPsd, xCell.Value, xEnc)
End If
Next
End If
End Sub
Step 3
Then click F5 to run the module. Then select the range of cells you want to encrypt or decrypt and click OK.
F5 > Select Cells > Ok.
Step 4
Then give a password and click OK.
Password > Ok.
Step 5
Then finally, select whether to encrypt or decrypt and click OK.
Select Encrypt or Decrypt > Ok.
This is how you can encrypt or decrypt selected cells in Excel.
Conclusion
In this tutorial, we have used a simple example to demonstrate how you can encrypt or decrypt selected cells in Excel to highlight a particular set of data.
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