Quantum symmetric encryption can be based on the obfuscation of a specific kind of function, which will not be ruled out by the impossible result. Also, quantum point obfuscation is practical in the quantum random oracle model. These facts derive the extended properties of quantum symmetric encryption. In this chapter, we introduce quantum symmetric encryption schemes based on quantum point obfuscation. We start with the basic requirement of indistinguishability security and point out that a quantum virtual black-box obfuscator satisfies this requirement unconditionally. Such work formally demonstrates the implementation and application of quantum obfuscation.