As far as i understand, it's even a bad idear to use bitcoin and tor: https://arxiv.org/pdf/1410.6079.pdf
I've only read the abstract, but it seems plausible
the TL;DR version is basically: If an attacker does following steps:
Quote
• Inject a number of Bitcoin peers to the network.
Note that though Bitcoin allows only one peer per
IP address, it does not require high bandwidth. IP
addresses can be obtained relatively cheap and on perhour
basis.
• Periodically advertise the newly injected peers in the
network so that they are included into the maximum
possible number of buckets at the client side.
• Inject some number of meduim-bandwidth Tor Exit
relays. Even a small fraction of the Exit bandwidth
would be enough for the attacker as will be shown
later.
• Make non-attacker’s Bitcoin peers ban non-attacker’s
Tor Exit nodes.
Note that though Bitcoin allows only one peer per
IP address, it does not require high bandwidth. IP
addresses can be obtained relatively cheap and on perhour
basis.
• Periodically advertise the newly injected peers in the
network so that they are included into the maximum
possible number of buckets at the client side.
• Inject some number of meduim-bandwidth Tor Exit
relays. Even a small fraction of the Exit bandwidth
would be enough for the attacker as will be shown
later.
• Make non-attacker’s Bitcoin peers ban non-attacker’s
Tor Exit nodes.
he can achieve following things
Quote
1) they are exposed to attacks in which
an attacker controls which Bitcoin blocks and transactions the
users is aware of; 2) they do not get the expected level of
anonymity.
an attacker controls which Bitcoin blocks and transactions the
users is aware of; 2) they do not get the expected level of
anonymity.
