A chip technology, dubbed CryptoFirewall, is designed to be made using standard fabrication processes, reducing the cost for printer manufacturers. It is designed to obscure its inner workings to hackers, with large portions of the chip dedicated to redundant and obfuscated features. "You can see 95 percent of the grid and you still don't know how it works," Cryptography's vice president of business development Kit Rodgers told News.com. While the chip uses known technology such as private-key encryption to prevent unauthorized ink cartridges from working in printers, the company claims that it generates separate, random codes for each ink cartridge, making it difficult for hacking groups to find a general workaround.

At Ars Technica.

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