(Note that this has exactly the same potential security problems as something involving a key; e.g. if you keep a copy on a machine connected to the internet, someone might hack you and steal the secret message.)
Thanks everyone, this is great! So basically there’s already a user-friendly way to do this, but we just have to be careful to write the “key” on paper instead of on one’s internet-connected computer (in case one is worried about hackers etc.) And then keep the paper somewhere. This still adds a bit of overhead because writing down all those random numbers and letters is probably annoying...
If you have a password manager (either online or offline) that you trust to keep your passwords, then you can also trust it to keep your key and message.
(Note that this has exactly the same potential security problems as something involving a key; e.g. if you keep a copy on a machine connected to the internet, someone might hack you and steal the secret message.)
Thanks everyone, this is great! So basically there’s already a user-friendly way to do this, but we just have to be careful to write the “key” on paper instead of on one’s internet-connected computer (in case one is worried about hackers etc.) And then keep the paper somewhere. This still adds a bit of overhead because writing down all those random numbers and letters is probably annoying...
If you have a password manager (either online or offline) that you trust to keep your passwords, then you can also trust it to keep your key and message.
I think it would still be nice to have a dedicated website to make the process one-click