There are many trials where electronic evidences are not digitally signed. This problem requires the validation of the veracity of these digital resources, thus causing delays in the verdict and increase the price of the process. The digital signature solves partially the problem because it provides the characteristics of authentication, integrity and non-repudiation; but it has weakness such as availability, confidentiality and changes control, besides the complexity on its usage. This paper presents the project DoyFE.es that is an agent-based platform deployed over a cloud system that provided cloud-based services to guarantee the veracity of the communications (email, web content and photographs).