Show HN: PunchCard Key Backup

pckb -- PunchCard Key Backup About This small project -- available live at https://volution.ro/pckb (or https://purl.org/999 for long term permanence) -- allows one to take any 128 bits of information, and easily create (and especially easily recover) a backup of it into a physical medium, by using the old and tried method of punched cards (hence the project's name). For example, the 128 bit number represented in hexadecimal as d74ae47dc6f599d3f9cb847bd77d6b7c , can be backed up as the following standard (CR80 ID) card sized aluminium sheet, which can then be put into a safe place: All of this can be achieved by anyone at home, with access only to the following: using the self-contained HTML at the link above (https://volution.ro/pckb), either by entering the data manually, or by generating random data, one can get the hole punching pattern; (this whole procedure is described in the help, and you could consult it for more details;) from the same link above, or from here, one can ... Read full article.