However, HP's support page states this only applies to models manufactured before December 1, 2016. HP lists both printers, as well as others, as able to circumnavigate dynamic security under specific conditions. HP community support threads include complaints about the OfficeJet 7740 and OfficeJet Pro 6970. Some pointed to third-party brands they had relied on for years. "After contacting HP, they advised 'this is due to the recent 'update' of all printers.'" It's unclear when HP issued updates for which model printers, but there are alleged customer complaints online stemming from late last year, showing plenty of customers surprised their printer no longer worked with non-HP ink cartridges after an update. "HP have updated their printers to outright ban 'non-HP' ink! They no longer shows the 'can't guarantee quality' message, but instead cancels your print completely until you inset a HP ink cartridge," Reddit user grhhull posted Tuesday. HP is set on continuing to use DRM to discourage its printer customers from spending ink and toner money outside of the HP family. Reused, remanufactured, and refilled cartridges that reuse the HP chip or electronic circuitry are unaffected by dynamic security." The printers use the dynamic security measures to block cartridges using non-HP chips or modified or non-HP electronic circuitry. Dynamic security equipped printers are intended to work only with cartridges that have new or reused HP chips or electronic circuitry. HP uses dynamic security measures to protect the quality of our customer experience, maintain the integrity of our printing systems, and protect our intellectual property. As the company explains: "Dynamic security relies on the printer's ability to communicate with the security chips or electronic circuitry on the cartridges. Dynamic security is a feature used by HP printers to authenticate ink cartridges and prevent use of cartridges that aren't HP-approved.
HP has already faced class-action lawsuits and bad publicity from "dynamic security," but that hasn't stopped the company from expanding the practice. An anonymous reader quotes a report from Ars Technica: HP customers are showing frustration online as the vendor continues to use firmware updates to discourage or, as users report, outright block the use of non-HP-brand ink cartridges in HP printers.
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