Quote from: my dream2021 on July 01, 2019, 08:52:43 AM

Jika temen-temen ingin menggunakan wallet bitcoin usahakan cukup 1x pakai saja klo isinya banyak (jika sudah pernah digunakan untuk teransaksi keluar/diambil jangan pernah gunakan kembali wallet itu gunakan wallet baru) karna klo masih digunakan hal itu bisa berakibat fatal hilangya Btc anda dengan teknik brutalforce + BSGS (baby-step-gigant-step)

Address reuse itu terkait dengan sifat "anonim" Bitcoin, tidak terkait dengan keamanan bruteforce. Tidak masalah apabila agan menggunakan alamat Bitcoin berkali-kali, misalnya untuk deposit ke exchange (karena identitas toh sudah ketahuan dengan KYC).

Tentang BSGS itu kan hanya untuk mengerjakan puzzle saja sehingga entropinya memang sudah "setingan" si pembuat puzzle. Sudah dijelaskan di komentar si pembuat software:

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Since this gained some traction, I should explain more what this code does and does not do.

It can find the private key, if and only if, it starts with a lot of zeros. If the combination to your safe is 0000000000000000000000000000000000000000000000000007389230898162, this program will be able to find it. Every other non-zero digit will quadruple the run-time and the memory requirement. Remember the wheat and chessboard problem? This chessboard has over 100 squares and this program is the first grain. In other words it can only find private keys that were deliberately chosen to be breakable. It cannot be used to recover your private key that was created by a bitcoin wallet.

This program has only academic value. If you have difficulties compiling this program or understanding its output, then it is not for you. It won't help you to break any key, except if someone made up a challenge. In the latter case, I don't want to spoil the challenge by helping you to run this code

Sumur: https://gist.github.com/jhoenicke/2e39b3c6c49b1d7b216b8626197e4b89#gistcomment-2902043

Selama proses pembuatan alamat Bitcoin benar-benar random (gak pakai cara aneh-aneh: no ktp, artis JAV, dll.), agan-agan tidak perlu khawatir