A job device for increasing security of job data includes a CPU that encrypts job data while saving job data required in execution of a job. The CPU saves part of the data in RAM, and saves the remaining stored file in an HDD. When the job ends, part of the job data for the job in the RAM is deleted....http://www.google.com.au/patents/US7502944?utm_source=gb-gplus-sharePatent US7502944 - Job processing device and data management for the device
