A deterministic secure quantum communication scheme using entanglement swapping is proposed. The sender prepares four-particle genuine entangled states and sends two particles in each state to the receiver and remains the rest particles. If the quantum Cheapest Ugg Uk
channel is secure, they begin to communicate. After their four-particle projective Original Uggs Uk
measurements, the receiver can obtain the secret information according to his measurement outcomes and classical information from the sender. Using entanglement swapping, there are no particles carrying secret information to be transmitted.
Malignant melanoma in childhood is fortunately a rare condition. The last account of such a case as that described in this report was published in this Journal seven years ago (Oldbourne and Harrison, 1974). Stewart Harrison's patient was also a young girl. It is apparent that when a congenital pigmented hairy naevus is too small to be regarded as a giant naevus and malignant change is not anticipated, early diagnosis may be missed and with it the very small chance of cure. When malignant melanoma occurs in childhood it behaves no differently from the tumour in adults.