Quote from: fanya on Today at 05:11:54 PM

Quote from: Mia Chloe on Today at 04:12:57 PM

Quote from: Findingnemo on Today at 03:43:30 PM

We can generate our own private keys with the specified parameters in multiple ways. Manual methods such as Rolling dice ny converting the results into binary and derive the bitcoin address from it or using the python script.

Hmmm... I think I do understand the concept now. Before now I've actually come across other methods of private key generation but now I get the concept why some generation approaches are safer than others. Basically what it simply means is that the OP generated his keys with an algorithm with a lower entropy than regular key generation processes.

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I made my calculations for this scenario but in anyway with or without the lowercase it is impossible to break even if the entropy is around 103 bits.

Exactly but I think that means that although OP's entropy of 36⁴⁰ in contrast to 62⁴⁰ is of lower difficulty, still the difference in security level is almost same since both can't be brute forced.

I think there has been a misunderstanding here. I am not trying to get my private keys back, but the password to my Electrum file. I also used to store private keys in an encrypted zip file. I was very ignorant back then because there weren't many options yet

I have apparently split the password for these files into 2 files, it looks like. I didn't remember that either

Here is my old thread, I asked something similar. https://bitcointalk.org/index.php?topic=5523791.0

It is still not feasible, Electrum Wallet encrypts the wallet with a passphrase using a symmetric encryption algorithm, specifically AES and in this case A-Z 0-9 [20] brute force against an AES encrypted passphrase is not feasible due to the high complexity and time required.