Hidden Markov Model Sample Clauses

Hidden Markov Model. ‌ We denote the domain of states by S, S = {s1, s2, · · · , sN } where each si is a unit vector with the ith element being 1 and other N — 1 elements being 0. We denote sx the true state at each timestamp. For privacy protection, sx is unobservable to (hidden from) any adversaries. Thus it is an HMM. At times- tamp t, we use a vector pt < [0, 1]1<N to denote the probability distribution of s1 s2 s3 s4 s5 s6 s1 s2 s3 xxxx x0 x0 x0 x0 Xxxxx cancer s2 Xxxxx asthma s3 Xxx cancer s4 Xxx diabetes s5 Xxxx cancer s6 Xxxx diabetes (a) (b) (c) Figure 4.1: (a): a table showing patients’ diseases with each row being a secret; (b): a policy graph of bounded Blowfish; (c): a policy graph of unbounded Blowfish. s1 0.5 0.3 f2 s3