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2 votes

How Is it possible that bitcoin blocks store transaction data in 32-bit SHA256 strings. How would nodes know the transaction?

How is it possible that bitcoin blocks store transaction data in 32-bit SHA256 strings They don't. Bitcoin blocks store the full transaction data in binary. There is no SHA256 involved in its storage....
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0 votes

How to calculate the public key, compute point P and create signature using ECDSA?

The double and add method uses each number's binary representation to perform the computation. Taking a big-endian representation of a number, from left to right, if the n-th bit is 1, then you double ...
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6 votes

How is the generator point G chosen in the secp256k1 curve used in Bitcoin?

As Pieter already described in his answer it is not known why the multiplicative inverse of 2 of the generator point of secp256k1 is such a short (166 bit) number. But interestingly all prime order ...
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