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Authentication of pharmaceutical products

  • US 7,946,487 B2
  • Filed: 04/30/2009
  • Issued: 05/24/2011
  • Est. Priority Date: 05/18/2004
  • Status: Expired due to Fees
First Claim
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1. A method for authenticating a pharmaceutical product item, the pharmaceutical product item being associated with packaging having disposed thereon or therein coded data including a number of coded data portions, each coded data portion being indicative of an identity of the pharmaceutical product item and a part of a signature, the signature being a digital signature of at least part of the identity, the signature comprising a plurality of signature parts, the method comprising the steps of:

  • receiving indicating data from a sensing device, the sensing device being responsive to sensing one coded data portion to generate indicating data at least partially indicative of;

    the identity of the pharmaceutical product item;

    the part of the signature; and

    a signature part identifier;

    determining, from the received identity and the received signature part identifier, a determined signature part;

    authenticating the pharmaceutical product item by comparing the received part of the signature and the determined signature part,wherein the signature is a digital signature of at least part of the identity and padding, and the step of determining the determined signature part comprises sub-steps of;

    determining, using the received identity of the pharmaceutical product item, the padding;

    determining, using the padding, the received identity, and a secret key, the determined signature; and

    determining the determined signature part from the determined signature and the signature part identifier.

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