modulo

Added QR code generator spreadsheet for all Error Correcting levels (L, M, Q and H) for 25x25, 37x37 and 77x77 (Versions 2, 5 and 15) to the spreadsheets page.

Useful for quickly moving information between systems. Free of course.

In case you want to make a QR Code in #excel without downloading add-ins or uploading your data to the interweb.

https://modulo.network/spreadsheets

#qr #bitcoin #modulonetwork

Ever wanted to play with QR codes in a spreadsheet and not download anything or send your data to the internet? Now you can.

I added an #excel #spreadsheet to do a version 15 QR code generation, all error correction levels. (77x77 pixels)

Everything is done inside the spreadsheet and totally transparent—data arrangement, error correction calculations, everything.

No add-ins, no macros, no array formulas. The spreadsheet doesn’t send your data anywhere.

Have fun with it, break it, let me know if you do. My next mod to the spreadsheet is to have it produce all QR code versions; the basics are already in the spreadsheet so hopefully it isn’t too much more work.

Just throwing this out there

#nostr #bitcoin #spreadsheetstr

https://modulo.network/spreadsheets

New spreadsheet out—12th and 24th word generator when you randomly!, manually select the first seed phrase words. This spreadsheet gives you all the possible last check words

Interesting aspects: • In a 12-word seed phrase for first 11 words there are 128 possible 12th words that will work as a check word

• In a 24-word seed phrase for the first 23 words there are only 8 possible 24th words that will work as the check word

There are also some interesting diminishing randomness probability due to this aspect but won’t get into it here as it’s been discussed elsewhere

This is a tool for learning and fun—take extra care everything is offline whenever working with private keys. The spreadsheet does not have macros or array formulas so there’s that

You can find the spreadsheet near the bottom of the https://www.modulo.network/spreadsheets page of the modulo website

#bitcoin #privatekey #seedphrase #excel #%

Working on upgrading the #modulo website with its private key and excel spreadsheets

Getting pressure to accept something more nasty-paper-like than #bitcoin

Love to hear some feedback/constructive criticism about the site

https://modulo.network #bitcoin #nostr #excel #spreadsheet

A new spreadsheet dropped

I added a new #excel spreadsheet to the website— #bitcoin ‘s ECDSA secp256k1 but this time using binary numbers…got it down to a slim 49MB (yes that’s a lot less than the decimal version,) and much faster calculation of hexadecimal public keys. Like before, no macros, no array formulas

Fun and transparent to use and learn

I hope you enjoy it

https://www.modulo.network/secp256k1-ecdsa

#bitcoin #ECDSA #secp256k1 #excel #spreadsheet #nostr

I am pondering the next #bitcoine #spreadsheet for my website https://modulo.network and trying to decide what might be most interesting to create:

A) A binary version of the ECDSA secp256k1 public key spreadsheet (it might make it slightly smaller than its current version—it is already underway but I’ve run short of time recently)?

B) A spreadsheet to manage UTXO and sign said UTXO for publishing to the mempool, like a spreadsheet wallet?

C) A spreadsheet to show how taproot signatures work?

A is the only one I know is possible, and B requires HMAC development and a demonstration how ECDSA signing works, as well as some other work. I have no idea how long taproot will take…

Any suggestions for the above or requests for other #bitcoin #Excel spreadsheets?