Commit Graph

5 Commits

Author SHA1 Message Date
copyCat 341771ac3e copyright: bump to 2024 2024-05-21 16:29:33 +00:00
jeffro256 b0bf49a65a
blockchain_db: add k-anonymity to txid fetching
Read more about k-anonymity [here](https://en.wikipedia.org/wiki/K-anonymity). We implement this feature in the monero daemon for transactions
by providing a "Txid Template", which is simply a txid with all but `num_matching_bits` bits zeroed out, and the number `num_matching_bits`. We add an operation to `BlockchainLMDB` called
`get_txids_loose` which takes a txid template and returns all txids in the database (chain and mempool) that satisfy that template. Thus, a client can
ask about a specific transaction from a daemon without revealing the exact transaction they are inquiring about. The client can control the statistical
chance that other TXIDs (besides the one in question) match the txid template sent to the daemon up to a power of 2. For example, if a client sets their `num_matching_bits`
to 5, then statistically any txid has a 1/(2^5) chance to match. With `num_matching_bits`=10, there is a 1/(2^10) chance, so on and so forth.

Co-authored-by: ACK-J <60232273+ACK-J@users.noreply.github.com>
2023-08-01 17:25:25 -05:00
mj-xmr 5b4fea72cf Copyright: Update to 2023
Co-authored-by: plowsof <plowsof@protonmail.com>
extra files
2023-01-16 13:00:18 +01:00
mj-xmr da9aa1f7f8
Copyright: Update to 2022 2022-03-04 06:59:20 +01:00
Lee Clagett 0c7e7bce18 Adding classes, functions, and utilities for common LMDB operations. 2019-03-19 17:52:26 +00:00