you need to at least explain what software you used to generate the paper wallet.
My guess is that it is a bip38 or similar "encrypted"/derived private key. What data do you have? The encrypted private key, the bitcoin address and part of the password (6 characters missing with known charset)?
Some of these "standards" to encrypt the private key are quite difficult to attack because they use a quite good encryption and key derivation scheme (like scrypt and AES or some kind of hashing combined of course with some elliptic curve operations to generate the public/private key given a password as input).
All of these things (scrypt with reasonable high settings/ellipctic curve encryption etc) are quite difficult to do on GPUs and/or are not supported yet by hashcat.
Even if you think that 6 characters sounds like doable, it might not be the case depending on the way the paper wallet was generated.
Currently, only the hashing modes listed here: https://hashcat.net/wiki/example_hashes are supported by hashcat and for bitcoin the main one is the wallet.dat cracking which I think is not applicable in your case because you are talking about paper wallets.
My guess is that it is a bip38 or similar "encrypted"/derived private key. What data do you have? The encrypted private key, the bitcoin address and part of the password (6 characters missing with known charset)?
Some of these "standards" to encrypt the private key are quite difficult to attack because they use a quite good encryption and key derivation scheme (like scrypt and AES or some kind of hashing combined of course with some elliptic curve operations to generate the public/private key given a password as input).
All of these things (scrypt with reasonable high settings/ellipctic curve encryption etc) are quite difficult to do on GPUs and/or are not supported yet by hashcat.
Even if you think that 6 characters sounds like doable, it might not be the case depending on the way the paper wallet was generated.
Currently, only the hashing modes listed here: https://hashcat.net/wiki/example_hashes are supported by hashcat and for bitcoin the main one is the wallet.dat cracking which I think is not applicable in your case because you are talking about paper wallets.