From 14cc83c787783367bb71ce84cc25260b8aea9379 Mon Sep 17 00:00:00 2001 From: Lars Wirzenius Date: Fri, 10 Apr 2020 11:50:45 +0300 Subject: Add: comment about botnets and proofs of work --- email2-v2-draft.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/email2-v2-draft.md b/email2-v2-draft.md index 475ee42..50c3405 100644 --- a/email2-v2-draft.md +++ b/email2-v2-draft.md @@ -306,6 +306,11 @@ proof of work might require using five seconds of CPU time. This is costly enough that it makes large-scale spamming infeasible. (See [@hashcash] for an early suggestion.) +> Comment: This makes the stamp system vulnerable to attackers who +> have enormous amounts of computing power, perhaps by using a botnet. +> It would be good to replace proof-of-work with something that's not +> vulnerable to a botnet. + Email servers could also sell stamps for real money. Even at trivial costs, such as one US cent, this would be too costly for spammers. -- cgit v1.2.1