For example If I am running with 1 loaded public key BSGS and for argument sake with 1 key loaded I am operating at 100 million keys per second but if I substract and load 1000 of the same key just offset by a different distance from the target key my keys per second drops 100 million/1000 (more actually) but now I have 1000 more possible chances of a collision because i have added 1000 targets.
Example
03b6c66d90910721ac8e6f8ef0ebb222fff638227122b21c5853e787ca3d119f08 # - 651321717934608777722865459537368854
030e7b9ccf0feabe79d8745a89b575b52ff21333368b4a9c95c72dbef88a6105e2 # + 651321717934608777722865459537368854
029a564b60e6bed3449052228a609334b43d59bc5f79ca5c622334658ce89b6026 # - 657967857913533357087384494838770577
03a127833050783f814ee013e796fbc937067a86741564bdb9086a6e6e6398e11d # + 657967857913533357087384494838770577
03d0203676b61edda6208b2f9b204de5e8ee2849723458dc7531b1eaba503de390 # - 664613997892457936451903530140172300
0247dd5a10ae3aab4187c7af2a5babcc8ee401ed09e67fbc6ea75e35cc8471d8c9 # + 664613997892457936451903530140172300
02ceb6cbbcdbdf5ef7150682150f4ce2c6f4807b349827dcdbdd1f2efa885a2630 # target
If one of these keys hits then i just add or subtract the decimal value on the right from the hex private key found convert to decimal add or subtract than convert back to hex and now I have the key for 120 02ceb6cbbcdbdf5ef7150682150f4ce2c6f4807b349827dcdbdd1f2efa885a2630
I don't think keys per second drops using BSGS, not the one I put out that Jean Luc built.
It's actually faster because with multiple pubkeys you do not have to rewalk the baby steps every time. If you are using another version of BSGS, then I'm not sure about it. But the one I use, it's the same speed, but overall faster because it doesn't have to perform and store the baby walks every time.
With Kangaroo, it probably is faster searching 1 pubkey. Let's say you shifted down 2^10; now you'd have to search 1024 pubkeys in the 2^110 range.
Avg operations of 1 pubkey at 2^120 = 2^60 (roughly) but 1024 at 2^110 = 1024 * 2^55 = 2^65 operations
if 260 pubkeys in 110bit, then how much time it will take ?
