Modern business is linked to massive use of the Internet and mobile communications. Use of these communications can compromise the integrity and confidentiality of data during their transmission and their storage. Remarkably rapid development of IT allows efficient data protection, but also gives new opportunities for eavesdropping and spying. Even with the latest protection there are ways to access data unnoticed. The topic becomes more significant when one considers the recent events related to an affair with wiretapping of internet posts by the NSA. This paper discusses the current state of the e-business, in particular the protection of data and electronic mails.