In cell B14, I use this formula to select a semi-random delimiter from the ASCII table (characters, –. There are two INDEX functions that use the RANDBETWEEN function to select a random EFF word from a range of words that are pre-sorted by how many characters are in each word followed by a CHAR function that uses the RANDBETWEEN function to select a random number. This Excel formula does not include punctuation. Please look at the examples above to get a good idea. The 10Better column simply adds punctuation. The 10Good column contains a 10-character passphrase of lowercase, uppercase and numbers. My files generate 10- to 16-character passphrases. Please, do make a copy of either worksheet and modify to meet your needs. You will find a few more hidden sheets of data (like city names or shorter versions of the EFF dice words) that you may use if you want to customize your own formulas. A visible sheet named GeneratedPasswords that uses Excel’s INDEX function and RANDBETWEEN function.A hidden sheet named DataASCII that contains the ASCII Printable Characters, with their Decimal index/values.A hidden sheet named DataEFFLong1 that contains the EFF’s Long Wordlist, sorted by the number of characters within each word.The essential components to using Microsoft Excel or Google Sheets to generate semi-random passphrases are: Here is a static example of the semi-random passphrases these worksheets randomly create. EFF Dice-Generated Passphrase via Microsoft Excel Example ScreenshotĪ screenshot of the EFF Dice-Generated Passphrases via Microsoft Excel. Refresh your browser (F5) to generate a new round of passphrases. This is what you’ll find: 10- to 16-character easy-to-remember semi-random passphrases. EFF Dice-Generated Passphrases via Google Sheets.EFF Dice-Generated Passphrases via Microsoft Excel.If you just want some semi-randomly generated passphrases based on the EFF Large Wordlist, select either of these read-only publicly-accessible links. TL/DR: Links to the live Microsoft Excel and Google Sheets worksheets As always, use a good password manager and enable multi-factor authentication when available. Use or LastPass’ Password Generator for longer passwords that contain more entropy. They represent a good-enough approach to creating passwords users can memorize. The passwords generated via these Microsoft Excel formulas are semi-random. Please note, while I am an IT professional, I’m not a cryptographer or mathematician. This post is my effort to use Microsoft Excel or Google Sheets to semi-randomly generate random passwords by using the EFF’s Long Wordlist. In 2016, the Electronic Frontier Foundation created some enhancements over the original Diceware Passphrase list by creating the EFF Dice-Generated Passphrases list.
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