| Summary: | 碩士 === 國立高雄大學 === 資訊工程學系碩士班 === 105 === In this thesis, we propose two quantum information hiding methods. In the first method, we hide the secret by amplitudes of quantum position register in the quantum image. The recipient gets the secret by measuring the quantum position register of secret while he/she receives this quantum state. Unfortunately, this method will collapse quantum image after the recipient gets the secret. Therefore, we propose the second method that hides the secret by quantum teleportation method. By this way, the recipient not only gets secret but also holds the quantum image while he/she measures the quantum position register of secret. Our method utilizes Bell state, Bernstein-Vazirani algorithm and a novel enhanced quantum representation of digital images (NEQR). As compared with Wang et al.’s method which hides secret in least significant qubit (LSQb), our method won’t collapse the quantum image and decrease the computed cost of extracting one secret bit by O(n) times when constructing quantum operation, where n denotes the size of image.
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