To your e-mail unknown messages come from different e-mails. Now there are a lot of swindlers who try to crack with various tricks emails of users and "get" them in on a bubble scheme. Before opening of the letter it is necessary to study very attentively data on that person from whom the message came. How it is possible to recognize the owner of a box?

Anonymous messages are mysterious. Always there is a wish to guess who wrote the unsigned letter why preferred to remain the unknown? It is possible to make it in several ways.

The electronic signature represents an attribute of the electronic document which gives the chance to set lack of distortion of information in the document from the moment of forming of the electronic signature, and also to check signature accessory to the owner of its key. In the electronic signature the cryptographic information transform with use of the private key is used.

Knowing e-mail of your friend or acquaintance, you will always be with him in touch. It is possible to exchange pictures, to write letters, to transfer videos and music. Now by means of the Internet it is possible to send the message for read seconds. However it is not feasible if you do not know the user's email. What ways can be found e-mail of the person?