> What Luhn invented was a checksum, Agreed there is a distinction, but he invented hashing too. Citations: https://mitpress.mit.edu/books/ibms-early-comput

> What Luhn invented was a checksum, Agreed there is a distinction, but he invented hashing too. Citations: https://mitpress.mit.edu/books/ibms-early-computers https://mitpress.mit.edu/books/ibms-early-computers https://en.wikipedia.org/wiki/Hash_table https://en.wikipedia.org/wiki/Hash_table