Excel 2010 encryption - typical answers and questions
What encryption does Excel use?
Office 2016 (Access, Excel, OneNote, PowerPoint, Project, and Word) uses 256-bit AES, the SHA-1 hash algorithm, and CBC (Cipher Block Chaining) by default.
Hi folks, in this article we are going to give a really basic introduction to encrypting and decrypting messages and we are going to use Excel to do so, so this is good for anyone looking to improve their Excel skills, and good for too anyone just interested in learning about encryption ok so just to see how this stuff is done in the real world it's way more complicated so don't go if your an expert. Check out this article, this is not a article for you, okay so let's learn a lot of stuff anyway and we will be using nested functions including nestedvlookup functions. For people looking to learn about Excel this is a great example to work with advanced techniques so basically we have the alphabet in order here and we are going to decipher a message hello aencrypt it using the ciphertext technique that we have here and then we're going to decipher it and hopefully hello again okay and we're going to use formulas to do all of that, but before we get started let me explain what's going on, so here is the alphabet and the column of numbers is here only the first letter a is 0, the second letter B is 1 down to Zis 25, so there are 26 letters, but since we start at 0 there are 25 and that only counts all translated numeric The numeric column here is essentially based on a translation factor that the user defines, so here if we set 0, which means that the translation factor is 0, it becomes a one-to-one correspondence between the numerical Column give a and column Cright they are exactly the same column and in this way this encryption would actually result in a null encryption.
The encryption would just repeat itself, so no encryption is done so we can choose a translation factor between 0 and 25, 0 means no encryption and up to 25 that would mean Z would become a and soon, but we can choose anything in between , let's say 3, okay, now when I hit enter you see my newly translated numeric column h instead of starting at 0, now starts at 3, this is the translation factor going up to 25 and then starting again at 01 and ending at 2 Okay, so we are going to use this column and actually all three of these columns first to Inc in Creepencrypt this plain text message from hellothat we have okay here the way we do that is with a nested vlookup function ok so is the same vlookup let's instages we are going to do the internal vlookupfunction first if you are not familiar with welookup functions definitely check out my n article on that survived Oh almost 200,000 views on Vlookups ok I will also include a link in this article at the bottom of the description and baby so we can open it in a new tab and see before you get into this heavy lifting, okay so vlookup what do we want to look up well we want to look up the H where do we want to look it up well we want to look it up here in this table then I would normally press f4 here, but since f4 is another functionality in my screen capture software I have to do that Enter the dollar sign manually and I hope you know why I do that I close the table correctly again vLookups are new to you please watch the vlookup article I will definitely link it here okay so and then come back and if you understand vlookups, I'm sorry, but every now and then I have to cram that because people get completely lost, okay, so third argument, because if I can find the letter H. de, i want him to translate me then numeric number 10 okay comma wrong means exact match if i just hit enter here i should get the number 10 which means it found H and it gave me 10 like it should have been but i don't want 10 i want the message to be translated to another alphabet, an encrypted alphabet so i will go back i will go in front of it vlookup function and i will do another vlookup function this time enter, the lookup value is actually the number 10, so this vlookup is the veal is the lookup value in this other vlookup function that we run outside of this nest d vlookup okay if it finds and we already know what it will find if it's a chip finds 10 if it finds H we're first where we want to look for 10 well we want to look for it in this table over here that starts with the numerix column and leave me manually lock this table again because I f4 is something else for me, so if you manually enter the comma when you find the number 10, when you find this guy here, whatever produces what we already previewed show and we sell it was 10 what do you want good? I want you to give me the alphabet again so that column is 2 and then wrong again for an exact match. Close the brackets hit enter and go K now let's follow before we go any further so it looked for H first and it gave me 10 then that was the internal vlookupthen it i looked up here 10 and gave me K, so this happened, this is step 1 and then step 2 is okay, this one was in this one, okay, so this one was nested in this one, and so we get K okay, so now in motion we can just overwrite this formula, because we locked the corresponding tables without formatting and now this is our encrypted message, so hello has been encrypted to the core, okay, we want to come back now and decrypt this message in order to read it now Email systems use this a lot and everyone Types of messaging systems attempt to provide secure encryption so that people can intercept messages and properly steal information Credit Card Companies Oh Everywhere S Safety is a big deal and this area is incredibly complicated and high-level math, but our example is fun, it's a good introduction, and it's definitely edifying, okay, so let's get that ciphered message back in hello convert, hopefully here, okay, the way we do this I actually created a table on the right and this I called the decryption table which is basically that alphabet column and translate numerically to Reverse okay for you to translate that see cop's numeric column actually the first column is here and the numerix column is the third column Okay so let's create this formula so vlookup this time we are going to look up the K and where we are going to look up we are going to have to look it up here we need to lock you this table so I can manually insert the dollar sign comma when you find the AI that you give me the second column as my result give false forexact match, so we should get the number 10 again, this time we will nest the one we just created in another vlookup and lookup value this time is the first vlookup comma in the table of fists starting with of the translated numeric column, let's block this table - to give me the second column, closing brackets and we should get H and we're going to look at that, so what happened here, it found K over there in that column to the right K and then it gave me ten then it took ten search for it in this column found ten and then give me H okay and this formula is a robust formula so we can drag it to the right and weshou ld hello voila we do and so were we succeed in encrypting this message first and then decrypting it back into plain text using the nested vlookup function, a translation factor of three and only these two basic tables we could do in Excel itself, so I hope this was fun, perhaps informative, and definitely one of the rare times for those of you who want to improve your Excel skills too i used a nested vlookup function but in any case i am sure that people use this very often so very useful so be sure to subscribe to my channel i have almost a hundred articles on Excel Access PowerPoint and Math Share Do comments and practice
How do I open a password protected Excel 2010 file from Excel 2007?
Step 1: Open your Excel 2007 and click on 'File'. Step 2: Choose 'Open' from the file section. Step 3: Now search the file that you want to open and is protected with a password. Step 4: When you find the file, just open it and it will show you a prompt window.
How do I password protect a document in Word 2010?
Step 1 – Click the File tab, then Click Info. On the menu to the right Click Protect Document and Click Encrypt with Password. Step 2 – The Encrypt Document dialog will appear, Type in a strong password and then Click OK to finish.6 mei 2019
In this article, I'll show you how to unprotect a Word document that has been restricted from editing. You may have received a Word document, which is a form that you just have to fill out to find out that you are limited to the areas that you can actually type on the document and you are not allowed to change anything in the document, anything All you can really do is simply type in the fields made available to you. So if I want to go ahead and increase the space here, the form won't allow me, and that's because whoever created the form put a password on this document that prevents you from editing this form in this article.
I'm going to show you how to remove password protection in ten easy steps. Here we have a document that is password protected and I can say this because when you look at the top menu box, everything is gray so you are not allowed to do anything if you click on Developer in the top mini box and then click on Restrict Editing, you'll notice If this document is password protected, you will need a password to unlock this document. I don't have a password for this document, so the only thing I can do is change this document to basically remove the password, and here is how you go about it.
The first thing you want to do is save this file as an RTF document. The first thing you want to do is save this file as an RTF document. So click Save File As and I go to change the filename to include RTF at the end just so I can distinguish it from the other files I have on my desktop and I will save the file as RTFa- Save rich text format file.
Click Save to close this original document. Now I have two documents on my desktop, one that is protected and the other that is protected but in rich text format. I don't need the original.
I go in and delete the next you have to open the RTF file in notepad so go ahead and open notepad and then drag your RTF file and drop it into the notepad what this will do is the Open code for the current document you are now viewing. Anyway, you don't need to understand any part of what is in front of you, here is what you need to know You need to be able to remove the password and click Edit, Find or just press Ctrl F and then type password You will find that found the word password in this document what you want to do is that you want to mark everything after the word password has been deleted by hand, so delete up to the bracket right there and that's it you want to go in and save the file and close the notepad. Now open the protected RTF file again.
The RTF file is still protected. So if you look at the top menu box everything is still grayed out. So we have to stop protection click developer click restrict edit go down o on the side and in the right corner click stop protection this time I wasn't prompted for a password, it just basically gave me the Options to restrict editing and to change.
Let's go and uncheck both boxes I have completely removed password protection from this document. I'm going to go ahead and close this and now you want to click Save File As and now I'm going to save this document as a Word Document so I'm going to change the file name to Unprotected and change the file type to Word Document. I'll save that back to my desktop and that's all I'll close and get rid of the RTF file I don't need it anymore If you click on the unprotected file you'll find that the menu is now open for you to modify and modify as much as you want without risk limitation if you find this article useful please subscribe to our channel
How do you encrypt a cell in Excel?
- Open the sheet containing the data you want CellShield to encrypt. ...
- Select the range of cells to encrypt.
- Click on the CellShield tab in the Excel ribbon.
- Click the 'Encrypt & Decrypt' button on the CellShield menu; then select 'Encrypt' from the drop-down list.
In this article I'm going to show you how to encrypt or decrypt a series of numbers, let's say credit card numbers, phone number, social security numbers, I use social security numbers and this is what I do here I use a formula to encrypt them and then decrypt them is a very simple algorithm me did this for reasons, if you ever use this for illegal purposes law enforcement can easily decipher it, so what based on that is based on the fact that every character, including numbers, has a specific question number three four, and I'll do that 225 or so similar and then I use the function sign based on G 1 and copy this formula down to show what that symbol or letter or character stands for in ASCII numbers On this particular Icome you can use the code function based on H 1 H 2 Use H 3 and return these numbers back. So if you know we can create a pretty simple function, you can't do it with regularfunctions you could try an array function but unfortunately you would have to concatenate functions and concatenate doesn’t work with arrays so I have to create a VBA formula I will do this so that I can test these two artificial functions later I go to Visualbasic altbas F 11 insert a module and I created a function that I randomly call and truncated. I've already told you it's a very simple algorithm, and that's why I explained to you why I am using two arguments as input, is the string we want to encrypt and B and truncates this to a boolean value on orfalse That will allow me to decrypt a nightly encryptor by declaring a couple of variables, then we reverse that input which makes it a little harder to crack the code, and I'll use that input as a string because I'm going to change that in the reverse order of as input and I capitalize everything, you can capitalize it if you want, then we will go through a loop for all characters of the input, because I equals 1 the length of s input we take the middle part of s input and Precision i1and then position two three four and one character long, then we say to an S character that we add a certain number of ASCII numbers or sub so I take the ASCII number of characters and add to it or subtract 20 from it, but I do that with an IIF function if B and Clipped Extrude and we add 20 otherwise we subtract 20, that is, d then store we in s new, what we already had is new and the new character and it does that until it has done that for all characters and then we say to encode what the name of the function is, give me as new what it is now after all these loops you can also go back to lowercase if you don't like uppercase, so we can use that function quite simply now, just put the function in there right away and trigger, and it's encrypted and truncated.
It takes two arguments it needs to know which number is comma and we want to encrypt it, so we set the second argument to true and accept the formula, which is the encrypted version of that social security number, I double click it down and these are the encrypted versions , so now I can basically delete the BI column. I don't want to see this social security number and I don't want anyone to see these numbers, but I can ideally still be because this one looks in B so I need to make sure these are replaced with values so let's copy and paste it it in itself a pay specialas a value so now i have a bit of the formula i had to use to do that, now i can delete this and i still have if i ever need to know what the code was , I can decrypt it so I use the same function again and truncated, but this time I use the encrypted D-Fusion and decrypt it by setting the second argument to false and that was the original code so that was all based on of this simple feature that we put in a module, when you do this make sure you save this file as a macro-enabled file, otherwise this Mekko will no longer be a and we throw it away when you go back here, that works z ne but I have to do a lot of work I have to insert special values here again and then the elite column B or whatever you want to do, let's do it with a so-called subroutine or a method we're going to create instead of typing that number in. There we're going to use twomeckel'sone that I created a shortcut for andclipped and deciphered Mekel on how to make shortcuts I've explained in many of my other articles so I will don't explain that again, so how are we going to do it? Show what the shop encrypted is doing This time it's a shop, not a function We declare a variable of the string type then we store in s text in this variable whatever someone enters in an input field We do a little validation when the length of this Text is not nine characters I'm assuming it's a Social Security number that is always nine characters but you may need to change that then go to the label again I am reinserting the label here with a quorum so that You get back to that input box so you'll have to type it in again and do a better job, if it's not numeric then you'll also have to go back to get a Social Security number that needs numbers and eventually we'll get into the active one Cell insert the cell that we are in the encrypted version of s-text and are encrypted with this function it can be this fun call directly and we do something similar to decrypt we declare s text as a string we store in s steps whatever is in the active cell we decrypt it by setting it to false and then we show in a message field what the decrypted version it is is basically pretty simple but now I can just type that in D and I'll copy this one here so I don't have to type that number Control C or Control X active and now I do my shortcut on Ctrl-Shift-E Enter yours Social security number here a I control V so I don't have to enter it and when I click OK it inserts this cell into the encrypted version, now I'm doing the opposite I would like to see for a moment what really is the code behind it, what is that the social security number, so Ctrl-Shift-D and it gives me exactly the real decrypted number behind it
How to remove encryption from Excel-excelchat?
The Encrypt Document dialog box will appear. Figure 15. Encrypt Document preview pane Step 3. Delete the contents of the Password text box and click OK. Figure 16. Deleting the entry in Password textbox Finally, we have removed the password from the file. Remember to save the file to complete the password removal process.
How do you encrypt a file in Excel?
Step 1: Open the Excel file that you want to encrypt in Excel program. Step 2: Go to the “Review” tab on top of the window and click on the “Protect Workbook” option in the “Changes” section. Step 3: On the popup dialog, drop your password in the box and click on “OK” button to confirm it. Note: In Excel 2010...
How to password protect and encrypt Microsoft Office 2010?
Step 1 – Click the File tab, then Click Info. On the menu to the right Click Protect Document and Click Encrypt with Password. Step 2 – The Encrypt Document dialog will appear, Type in a strong password and then Click OK to finish.
Are there encryption features in Microsoft Office 2010?
Encryption Features come built into all the Microsoft Office 2010 Suite of applications including Word 2010, Excel 2010, and Powerpoint 2010. This feature is a nice improvement over password protecting documents under Office 2007 since it is also password protected – but the new process for Office 2010 is consistent across the core Office suite...