A set of tools for brute-forcing Bitcoin private keys. Currently the project requires a CUDA GPU.

Visual Studio 2015

CUDA Toolkit

KeyFinder.exe [OPTIONS] TARGET

Where TARGET is a Bitcoin address

Options:

-d, --device            The device to use
-b, --blocks            Number of blocks
-t, --threads           Threads per block
-p, --per-thread        Keys per thread
-s, --start             Staring key, in hex
-r, --range             Number of keys to search
-c, --compressed        Compressed keys (default)
-u, --uncompressed      Uncompressed keys

The simplest usage, the keyspace will being at 0, and the CUDA parameters will be chosen automatically

KeyFinder.exe 1FshYsUh3mqgsG29XpZ23eLjWV8Ur3VwH

To start the search at a specific private key, use the -s option

KeyFinder.exe -s 6BBF8CCF80F8E184D1D300EF2CE45F7260E56766519C977831678F0000000000 1FshYsUh3mqgsG29XpZ23eLjWV8Ur3VwH

Use the -b, -t and -p options to specify the number of blocks, threads per block, and keys per thread.

KeyFinder.exe -b 32 -t 256 -p 16 1FshYsUh3mqgsG29XpZ23eLjWV8Ur3VwH

Use the -r or --range option to specify how many keys to search before stopping. For instance, to search up to 1 billion keys from the starting key:

KeyFinder.exe -s 6BBF8CCF80F8E184D1D300EF2CE45F7260E56766519C977831678F0000000000 -r 1000000000

Note:

Integer values can be specified in decimal (e.g. 123), or in hexadecimal using the 0x prefix or h suffix (e.g. 0x1234 or 1234h)

There are 3 parameters that affect performance: blocks, threads per block, and keys per thread.

blocks: Should be a multiple of the number of compute units on the device. The default is 16 times the number of compute units.

threads: This must be a multiple of 32. The default is 256.

Keys per thread: The performance (keys per second) increases asymptotically with this value. The default is 16. Increasing this value will cause the kernel to run longer, but more keys will be processed.

If you find this project useful and would like to support it, consider making a donation. Your support is greatly appreciated!

BTC: 1LqJ9cHPKxPXDRia4tteTJdLXnisnfHsof

LTC: LfwqkJY7YDYQWqgR26cg2T1F38YyojD67J

ETH: 0xd28082CD48E1B279425346E8f6C651C45A9023c5