Quantum computing started with the research work of such scientists as Max Planck and Albert Einstein. The initial idea of their studies was to solve the problem posed by black body radiation. In 1900 Planck introduced the quantum of energy, in order to describe the spectral properties of radiation, through a process of discrete distances or quantization. These research work led Planck and Einstein to enter the study of energy, molecules and atoms, and to pioneer quantum physics. Maxwell, Bohr, Louis de Broglie, Schrodinger, Podolsky, Rose, Feynman, among others, continued such path. Quantum computing is based on the use of features such as photon superposition and entanglement, which are useful for storing and sending information through the qubits. Different projects involving quantum computing may be found nowadays, which are making it a reality, but there are also threats to information security, which are not being considered, and which could damage information systems by breaking the current cryptographic rules, thus putting information confidentiality at risk in unthinkable spaces. Keywords: quantum computing; confidentiality; entanglement; qubits; superposition