Topic: Lattice Attack (Read 401 times)

It seems like you're encountering an error related to the type of the private key value in the lattice_attack.py script. The error message "private_value must be an integer type" suggests that there might be an issue with the format of the private key value being used.
To troubleshoot this issue, you should check the data file data.json that you're loading. Make sure that the private key values are stored as integers. If they are stored as strings or in a different format, you may need to convert them to integers before passing them to the relevant functions.

Regarding your second question, if you want to input your own data for (RSZ, hashes), you'll need to modify the data.json file directly. This file likely contains a JSON object with keys corresponding to different parameters used in the attack, such as the number of bits of the secret key k, the public key pubkey, and possibly other parameters like RSZ and hashes.
Simply locate the relevant keys in the JSON object and replace the existing values with your own data. Ensure that the format of your data matches what the script expects. After making the changes, save the file and rerun the script. Make sure to follow any specific instructions or conventions regarding the format of the data within the script's documentation or comments.

ah yes..i got that now. just for everyone who is reading this sake (and mine too) , is it enough to just give the public keys without giving the coordinates and the RSZ?

Traceback (most recent call last):
  File "/home/krash/lattack/lattice_attack.py", line 259, in
    lattice_attack_cli(arg.f, arg.l)
  File "/home/krash/lattack/lattice_attack.py", line 239, in lattice_attack_cli
    result = recover_private_key(
  File "/home/krash/lattack/lattice_attack.py", line 195, in recover_private_key
    res = test_result(lattice, pub_key, curve)
  File "/home/krash/lattack/lattice_attack.py", line 93, in test_result
    if target_pubkey == ecdsa_lib.privkey_to_pubkey(cand1, curve):
  File "/home/krash/lattack/ecdsa_lib.py", line 129, in privkey_to_pubkey
    ec.derive_private_key(pv_key_int, ec_backend, backends.default_backend())
  File "/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/asymmetric/ec.py", line 332, in derive_private_key
    raise TypeError("private_value must be an integer type.")
TypeError: private_value must be an integer type.

Did you install the dependencies and follow what's on the readme?

It tells you how to edit the json file with your own information on what you know of your private key and coordinates of the public key, this is why I ask, maybe it's a step you've missed.

Hello
If you have sage installed this conflict with fpylll integers.
Possible solution is just use int(cand1) and int(cand2)  to avoid this.

For second question.
public transtion R,S,Z don't have leaked nonce.
bitlogik lattice attack need leaked nonce min 4 bit with 100 sign pairs.

If you consider you have weak nonce pairs in your R,S,Z you can use sage method from https://github.com/daedalus/BreakingECDSAwithLLL
This one don't need leaked nonce bit but its attack on weak nonce data in R.