Hacking Series Part 19

Challenge: Holiday Hack Objective 11a

Category: pwn?? blockchain??

We are given a part of a blockchain and told to predict the nonce of block 130000. Since every block prior to the 130000th has a nonce, we can use the pseudo-randomness of these numbers to predict the future ones. With the PRNG predictor Python module (mersenne-twister-predictor or mt19937predictor), you can do this easily for both 32 and 64 bit numbers.

Using predictor.setrandbits() you can insert previous nonce values and the type of integer to…

some chaos for you

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