# Gavin Andresen
# 2010-08-11 16:10:56
# https://bitcointalk.org/index.php?topic=788.msg8761#msg8761

Bitcoin's p2p network is subject to various kinds of denial of service attacks. @p{par}

There, I said it. @p{par}

Do you have constructive suggestions for how to fix it, or are you the kind of person who just enjoys breaking things because you can? @p{par}

Ideas that have been bouncing around my head that may or may not work: @p{par}

+ have clients tell each other how many transactions per unit of time they're willing to accept.  If a client sends you more (within some fuzz factor), drop it.  Compile in a default that's based on estimated number of transactions for a typical user and estimate on the number of current users. @p{par}

+ require some proof-of-work as part of the client-to-client connection process (helps prevent 'Sybil' attacks). @p{par}

This is an active area of research; see, for example: @s{(link)}