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System for advanced protection of consumable or detachable elements

  • US 10,449,774 B2
  • Filed: 07/18/2018
  • Issued: 10/22/2019
  • Est. Priority Date: 02/06/2015
  • Status: Active Grant
First Claim
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1. A method of data transfer between a 1st consumable or detachable element of a continuous inkjet printer and this continuous inkjet printer, said 1st consumable, or detachable element, comprising a 1st encryption algorithm and a 1st secret key, as well as at least one item of data, encrypted with a 2nd encryption algorithm and a 2nd key, termed the shared key, said continuous inkjet printer also comprising said 2nd encryption algorithm, said 2nd shared key being stored in at least one of said 1st consumable or detachable element and of said continuous inkjet printer, the method wherein:

  • a)—

    at least one item of data, encrypted with said shared key, is transferred from said 1st consumable or detachable element to the continuous inkjet printer or from said continuous inkjet printer to said 1st consumable or detachable element;

    b)—

    when at least one item of data, encrypted with said shared key, is transferred from said 1st consumable or detachable element to the continuous inkjet printer, said continuous inkjet printer deciphers, with help of said shared key, said at least one item of data.

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