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Replaceable printer component including a memory storing a tag encryption mask

  • US 9,707,783 B2
  • Filed: 05/29/2008
  • Issued: 07/18/2017
  • Est. Priority Date: 05/29/2008
  • Status: Active Grant
First Claim
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1. Anon-transient data storage device for a replaceable printer component, storing:

  • data in a plurality of tags and a plurality of data blocks, each tag identifying a length of a corresponding data block, anda tag encryption mask that indicates an encryption status of each data block of the plurality of data blocks; and

    a communication link comprising electrical contacts to link the data storage device to a printer controller of a printing system when the replaceable printer component is installed in the printing system;

    wherein;

    the tag encryption mask indicates the encryption status of each data block by associating each encryption status to each respective tag of each data block, andthe encryption status indicates to the printer controller that reads the encryption mask whether the respective data block is encrypted or unencrypted for decrypting a data block indicated as encrypted and not decrypting a data block indicated as unencrypted for reading the contents of the data blocks.

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