* 1 - l - I can be easily confused
* one can easily type small cap instead of capital or the opposite (more chances, but not limited to those where the small cap and the capital letter is written in the same way)
* v and w can easily be written incorrect
* 5 and S
* 9 and g
You can solve all of these issues by coming up with a system that indicates if a character is a number, an upper case letter, or a lower case letter. * one can easily type small cap instead of capital or the opposite (more chances, but not limited to those where the small cap and the capital letter is written in the same way)
* v and w can easily be written incorrect
* 5 and S
* 9 and g
For example, you could underline every upper case letter, and overline every number (those without an underline, nor an overline would be a lower case letter by process of elimination).
You can always check to ensure you wrote down a private key correctly by typing the private key after you write it down. If the key matches, you know the private key was written correctly, and if it doesn't match, you can look to see if the error was a reading or writing mistake and make the appropriate correction.
The problem IMO with writing down a private key is that people's handwriting will generally change over time, and something you can easily read today may be illegible in several years.
