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Re: resistance to swamping attacks.
> I'm no expert in cryptography, but it seems to me that what is needed is
> a function which is expensive for the originator of a packet to
> calculate, but cheap for the receiver to verify. This will make sure
> that the source of a swamping attack must have a much larger CPU than
> the receiver. I don't know if there are any such functions, but perhaps
> the cryptographically sophisticated among us could enlighten?
A simple imbalance in "expense" isn't enough -- what if the attacker
does a lot of precomputation before launching the attack?
- Bill
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