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Method for operating a network, a system management device, a network and a computer program therefor

  • US 8,539,235 B2
  • Filed: 09/28/2009
  • Issued: 09/17/2013
  • Est. Priority Date: 10/06/2008
  • Status: Active Grant
First Claim
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1. A method for operating a network, comprising a node and a system management device, the system management device comprising a root keying material being a set of functions each having a degree of complexity of α

  • , and the node being provided with a node keying material share having a degree of complexity of α

    , the node keying material share being derived from the root keying material, the method comprising, upon receipt at the system management device of a request for an external user to gain access to the node;

    a) generating, by the system management device, an external user keying material share and an access identifier, the external user keying material share having a degree of complexity α and

    being generated from the root keying material;

    b) generating, by the system management device, an access keying material and an identifier of the node, the access keying material having a degree of complexity less than α and

    being generated from the external user keying material share;

    c) the system management device providing the external user with the access keying material share and the access identifier;

    d) the external user deriving a key from the access keying material share, and transmitting this key and the access identifier to the node;

    e) the node computing a key from the access identifier and the node keying material share; and

    f) the node comparing the key transmitted by the external user and the key computed by the node, so as to authenticate the external user.

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