Re: [IPsec] Restarting the discussion about the puzzle

2015-05-20 Thread Valery Smyslov
Hi Yaron, First, I raised a third concern, which is that allowing the client to decide on the difficulty of the puzzle it is willing to solve adds unneeded complexity. Basically the client doesn't have enough information to make a good decision. The problem is that the server doesn't have

Re: [IPsec] Restarting the discussion about the puzzle

2015-05-11 Thread Yaron Sheffer
IMO we should choose a reasonable balance and fix it in the document. We should care about packet size for sure, but 64 hashes are not that much work. Thanks, Yaron On 05/11/2015 06:01 PM, Yoav Nir wrote: On May 9, 2015, at 7:32 PM, Yaron Sheffer yaronf.i...@gmail.com wrote: Hi

Re: [IPsec] Restarting the discussion about the puzzle

2015-05-11 Thread Yoav Nir
On May 9, 2015, at 7:32 PM, Yaron Sheffer yaronf.i...@gmail.com wrote: Hi Yoav, First, I raised a third concern, which is that allowing the client to decide on the difficulty of the puzzle it is willing to solve adds unneeded complexity. Basically the client doesn't have enough

Re: [IPsec] Restarting the discussion about the puzzle

2015-05-09 Thread Yaron Sheffer
Hi Yoav, First, I raised a third concern, which is that allowing the client to decide on the difficulty of the puzzle it is willing to solve adds unneeded complexity. Basically the client doesn't have enough information to make a good decision. To answer your question, I think we've already

[IPsec] Restarting the discussion about the puzzle

2015-05-07 Thread Yoav Nir
Hi. As a reminder, there were two concerns about the difficulty of puzzles: • That some clients are weaker than others and therefore are able to try less keys in a unit of time • That individual puzzles might prove more difficult than other puzzles, so some “unlucky” initiators