System and method for coupling users to a retail computer system with low risk of eavesdropping

A method for providing access to an establishment's computer network comprising:

• retrieving biometric data of a user from a data storage unit born by the user;
• modulating a low power, low frequency signal with the biometric data;
• transmitting the modulated signal by capacitively coupling with the user's body;
• receiving the transmitted modulated signal;
• and
• retrieving prior purchasing activity data of the user from a memory remote from the user based upon the received signal.

A method for providing access to an establishment's computer network comprising:

• storing data associated with a customer in a database remote from the customer;
• modulating a low power, low frequency signal with data identifying the customer;
• capacitively coupling the modulated signal to the customer's body for transmission to a network of the establishment;
• receiving the transmitted modulated signal with a network receiver located proximate to the customer;
• associating the received customer data with the stored data associated with the customer;
• determining the dollar amount of purchases associated with the customer;
• comparing the obtained dollar amount with a threshold dollar amount;
• and
• determining a coupon to be offered based upon the comparison.

A method for providing access to an establishment's computer network comprising:

• storing data associated with a customer in a database remote from the customer;
• modulating a low power, low frequency signal with data identifying the customer;
• capacitively coupling the modulated signal to the customer's body for transmission to a network of the establishment;
• receiving the transmitted modulated signal with a network receiver located proximate to the customer;
• associating the received customer data with the stored data associated with the customer;
• locating the network receiver at a specific promotion site;
• generating a promotional message based upon the associated stored data and the specific promotion site;
• and
• providing the promotional message to the customer.

A method for providing access to an establishment's computer network comprising:

• storing data associated with a customer in a database remote from the customer;
• modulating a low power, low frequency signal with data identifying the customer;
• capacitively coupling the modulated signal to the customer's body for transmission to a network of the establishment;
• receiving the transmitted modulated signal with a network receiver located proximate to the customer;
• and
• associating the received customer data with the stored data associated with the customer,
• wherein modulating a low power, low frequency signal comprises:
• modulating a low power low frequency signal with customer biometric data.