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| -rw-r--r-- | email2-v2-draft.md | 5 |
1 files changed, 5 insertions, 0 deletions
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. |