http://monerotoruzizulg5ttgat2emf4d6fbmiea25detrmmy7erypseyteyd.onion/nb-no/2021/09/20/post-mortem-of-decoy-selection-bugs.html
Ideally, all wallets would conform to the same spec of the decoy selection algorithm to ensure transaction uniformity, so that transactions on-chain cannot be tied to a particular wallet implementation. Technical Explanations Applying the algorithm incorrectly (Bug 1) The decoy selection algorithm is designed to select outputs from across the blockchain based on observed spending patterns, as recommended in Möser et al .