  Confidentiality, Integrity, and Availability are basic goals of security
architecture. To ensure CIA, many authentication scheme has been introduced in
several years. Currently deployment of Public Key Infrastructure (PKI) is a
most significant solution. PKI involving exchange key using certificates via a
public channel to a authenticate users in the cloud infrastructure. It is
exposed to widespread security threats such as eavesdropping, the man in the
middle attack, masquerade et al. Quantum cryptography is of the most prominent
fields in the modern world of information security. Quantum cryptography is
considered to be a future replica of classical cryptography along with a vital
stance to break existing classical cryptography. This paper aims to look into
basic security architecture in place currently and further it tries to
introduce a new proposed security architecture for cloud computing environment,
which makes use of the knowledge of Quantum Mechanics and current advances in
research in Quantum Computing, to provide a more secure architecture.
