Fundamentals Of Any Trusted Operating System Essay

Fundamentals Of Any Trusted Operating System Essay

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The fundamentals of any trusted operating system (OS) is based on the eight secure design principles introduced in Saltzer and Schroeder’s article titled “The Protection of Information in Computing Systems” published in 1975. These principles include Least Privilege, Economy of Mechanism, Open Design, Complete Mediation, Permissions Based, Separation of Privilege, Least Common Mechanism, and Ease of Use which have been applied to software and system design over the past four decade to improve the security elements of each design. “A trusted is one that has been shown to warrant some degree of trust that it will perform certain activities, that is, in accordance with users’ expectations.” (Plfeeger, Plfeeger, and Marguiles, 2015) These “trusted operating systems” display the necessary characteristics that provide evidence to the user that the function as they are intended to and incorporate security to a great extent by utilizing the secure design principles referenced above. While there are many similarities between the various flavors of Linux operating systems, Microsoft’s Windows, and Apple’s mobile iOS and their respective security models, there are clear differences in their implementation. A kernel is essentially the core of the OS where it “is the part of an operating system that performs the lowest-level functions. In standard operating system design, the kernel implements operations such as synchronization, interprocess communication, message passing, and interrupt handling.” (Plfeeger et Al., 2015) Additionally, the operating system kernel forms a trusted computing base which allows the operating system to interface with the hardware. The kernel is also responsible for enforcing security mechanisms for the operating sys...


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... 2013) Encryption plays an active role in providing the required confidentiality for information retained on the Apple device. “Every iOS device has a dedicated AES 256 crypto engine built into the Dynamic Memory Allocation (DMA) path between the flash storage and main system memory, making file encryption highly efficient” (“iOS Security”, 2016). Apple’s iOS offers additional authentication features that are critical for mobile devices which are the various screen locks whether that is a passcode or a gesture that can be set so that a malicious person cannot pick up the device immediately after use to gain access to the information contained within it. Also, having the ability to remotely wipe your device is vital in protecting the information contained on it as it is very common for devices that are stolen to retain confidentiality of the sensitive personal data.

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