Abstract: A communication networking technique is presented that allows sending parties to send information to receiving parties through a third party, in such a way that said third party determines whether a sending party is “eligible” to send information to receiving parties and whether the information to be sent is “valid,” and the receiving parties can determine whether the sender has been deemed eligible and the information has been deemed valid, but no receiving party and no third party is able to associate a specific eligible sender to specific valid information. The information can be associated to several types of transactions: it can encapsulate payment information when the technique is used in financial transactions; it can encapsulate expressions of interest or vote when the technique is used in election and recommendation systems; it can encapsulate information that individuals want to share, when the technique is used in file-sharing systems.