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-rw-r--r-- | email2.md | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -343,3 +343,7 @@ Links to more information, sources, etc. not have originated there. - <https://github.com/emacsen/rwot9-prague/blob/ap-unwanted-messages/topics-and-advance-readings/ap-unwanted-messages.md#postage> - <https://podbay.fm/podcast/252333772/e/1503662400> + +* Hashcash is a system where the sender proves they do some work + before the recipient accepts a message. + - http://hashcash.org/ |