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A verifiable  $(t, n)$  threshold quantum secret sharing scheme with sequential communication was proposed recently. In this work, we analyze its security and then give two new participant attacks. Using the first participant attack, the first participant can obtain the dealer’s secrets by himself with nonzero probability without being detected. Using the second participant attack, a dishonest participant can gain access to the dealer’s secrets by himself in the secret reconstruction phase while he can make the other participants recover false secrets instead of the real ones without being detected. Furthermore, we present an effective way to prevent these attacks.

Security of Verifiable Threshold Quantum Secret Sharing With Sequential Communication