On Wed, Oct 24, 2012 at 05:56:07PM +0200, Mike Hearn wrote: > I've written a draft BIP describing the bloom filtering protocol > extension developed by myself and Matt. > > https://en.bitcoin.it/wiki/BIP_0037
Two comments I made on the pullreq page, which are probably better discussed here: * The 0xFFFFFFFF/(n-1)*i seed value seems intended to result in large bit differences between the different hash function's seeds. Together with the tweak, however, the first and the last now get seeds tweak and tweak-1. I think something simpler like k1*i+k2*n+tweak is better (with k1 and k2 arbitrary large odd 32-bit integers). * I feel uneasy about the arbitrary filter parameters used for the implicitly created filter when sending filteradd without filterload. The server cannot be expected to make a reasonable guess how the client is going to use the filter, and the client still has to track how large the server-side filter grows anyway. I'd prefer to make this simply illegal (DoS 100): filteradd always requires an active filter. Maybe the actual filter data in filterload can be made optional: if it is omitted, it's assumed to be all zeroes (though that would mean the size has to be specified). -- Pieter ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
