Process for the relative locating of two electrical appliances

Abstract

A process allows the relative locating of a first electrical appliance and a second electrical appliance by the measurement of a first number of alternations or of electrical periods by the first electrical appliance from the energizing of the said first part and up to transmission of a signal by the first electrical appliance, the measurement of a second number of alternations or of electrical periods by the second electrical appliance from the energizing of the said second part and up to receipt of a signal from the first electrical appliance and the comparison of the first number with the second number.

1 - 10 . (canceled)  
     
     
         11 . A process for decrypting a digital content by a first electrical appliance plugged into a first part of an electrical network, a second electrical appliance being plugged into a second part of the electrical network, 
 comprising the following steps:    measurement according to a specified criterion of a first characteristic related to the electrical signal on the first part;    measurement according to said criterion of a second characteristic related to the electrical signal on the second part;    decryption if and only if the first characteristic is equivalent to the second characteristic.    
     
     
         12 . A process according to  claim 11 , wherein the first characteristic is equivalent to the second characteristicif and only if the first characteristic is equal to the second characteristic.  
     
     
         13 . A process according to  claim 11 , wherein the first characteristic is equivalent to the second characteristicif and only if the first characteristic differs from the second characteristic by less than a predetermined tolerance value.  
     
     
         14 . A process according to  claim 11 , with a step of: 
 exchange of the first characteristic or of the second characteristic by a communication by carrier currents.    
     
     
         15 . A process according to  claim 11 , wherein the first electrical appliance and the second electrical appliance are digital decoders.