By means of the signature transmitted to the server, which signature is stored by said server, the manager of the server is capable of certifying, through the private policy pre stored in the terminal station, that the user has indeed authorized reading of personal data predetermined as {HEAD ~ a function} of {TAIL ~ the server policy} 
By means of the signature transmitted to the server , which signature is stored by said server , the manager of the server is capable of certifying , through the private policy pre stored in the terminal station , that the user has indeed authorized reading of personal data predetermined as { HEAD ~ a function } of { TAIL ~ the server policy }
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