云计算同时面临着许多机遇和障碍。在所有面临的障碍中，安全被认为是云计算在其成功路径上的一个关键限制(Puthal et al.， 2015)。云计算方法中的安全问题具有广泛性和动态性。数据的位置是云计算安全的另一个关键组件。位置的透明性是云计算的突出灵活性，这对同一实例中的安全性构成了威胁。由于不知道特定的数据存储位置，《数据保护法》对某些区域的规定可能会受到严重影响，可以认为是违反(Dillion et al.， 2010)。因此，在云计算环境中，云用户的个人数据安全是一个至关重要的问题。在组织数据和个人信息安全方面，云提供商的战略策略被认为是非常重要的，因为人们认为仅仅依靠技术安全不足以解决问题。
另一个增加了安全性关注的问题是，由于云服务直接链接到云服务提供者的真实性和可信性，使用云服务的信任因素。建立信任被认为是开发一个成功的云计算环境的关键(Hashem et al.， 2015)。信任模型的提供在云计算中具有很高的重要性，因为它是任何云计算实例的涉众共同关心的领域。云中的信任因素依赖于各种元素，其中一些是人为因素、自动化管理、策略和流程。云信任不是技术安全问题，而是在更高程度上受云计算内在安全问题驱动的最具影响力的软因素(Islam et al.， 2016)。计算机网络和在途数据中的各种适用攻击都适用于基于云的服务。
The cloud computing is presented with several opportunities and obstacles in a simultaneous manner. Out of all the obstacles that are faced, security is regarded as a critical limitation for the cloud computing within its pathway to succeed (Puthal et al., 2015). The security concerns in the approach of cloud computing are wide and dynamic in nature. Location of the data is another crucial component within the security of cloud computing. Transparency of location is cloud computing’s prominent flexibility that is a threat towards security in the same instance. As not knowing the particular data storage location, the data protection act provision for certain areas may be critically affected and it can be considered as violation (Dillion et al., 2010). The personal data security of the users of cloud is therefore an essential concern within the environment of cloud computing. In respect to the organizational data and personal information security, the cloud providers’ strategic policies are regarded as extremely significant as it is considered that sole technical security is not sufficient to resolve the concern or the problem.
Another problem that increased the concerns of security is the factor of trust to utilize the cloud services for the reason behind its direct link to the cloud service providers’ authenticity and credibility. Establishment of trust is regarded as the key in developing a successful environment of cloud computing (Hashem et al., 2015). The trust model provision is of high essentiality within the cloud computing since it is a common area of interest among the stakeholders of any cloud computing instance. The trust factor within the cloud is dependent on various elements out of which some of them are human factors, management of automation, policies and processes. The cloud trust is not an issue of technical security but it is the soft factor which is of most influential nature driven by the inherent issues of security within the cloud computing to a higher extent (Islam et al., 2016).All sorts of applicable attacks within the network of computer and the in-transit data are applicable to the services based on cloud.