Kernel Modules Versus Applications

April 2, 2020April 2, 2020 Krishna Concurrency in the Kernel, kernel, Kernel Modules Versus Applications, kernel programming, Linking a module to the kernel, Linux, Linux kernel code, The Current Process, ubuntu, User Space and Kernel Space

Before we go further, it’s worth underlining the various differences between a kernel module and an application. Whereas an application

linux Tutorial ubuntu

Version Numbering & License Terms

April 2, 2020 Krishna bug, COPYING, development, experimental kernels, General Public License, GNU, GPL, License Terms, status of development, Version Numbering & License Terms, versions

Version Numbering Before digging into programming, we’d like to comment on the version numbering scheme used in Linux and which

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Security Issues

April 2, 2020 Krishna capability mechanism, encoding security policy, exploiting bugs, general security, incidental, kernel, policy issue, security check, security issue, Security Issues, superuser shell

Security is an increasingly important concern in modern times. We will discuss security-related issues as they come up. There are

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Classes of Devices and Modules

April 2, 2020 Krishna Block devices, Character devices, classes, Classes of Devices and Modules, filesystem, Linux, Network interfaces, software device

The Unix way of looking at devices distinguishes between three device types. Each module usually implements one of these types,

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Splitting the Kernel

April 2, 2020 Krishna Device control, Filesystems, kernel, Memory management, NETWORKING, Process management, Splitting the Kernel, unstructured hardware

In a Unix system, several concurrent processes attend to different tasks. Each process asks for system resources, be it computing

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DEVICE DRIVERS

April 2, 2020 Krishna capabilities, configuration, DEVICE DRIVERS, digital I/O driver, exploit, HARDWARE, The Role of the Device Driver

The Role of the Device Driver As a programmer, you will be able to make your own choices about your

Java Tutorial

Security Manager vs Access Controller

March 30, 2020 Krishna access controller, Java 2, Java 2 platform, Java API, Java programs, OPERATING SYSTEM, security framework, Security manager, Security Manager vs Access Controller, security policy

The access controller has been introduced in the Java 2 platform. Before the access controller existed, the security manager had

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Java 2 Class Loading Mechanism

March 30, 2020 Krishna code source, HTTP-based URLs, Java 2 Class Loading Mechanism, Java 2 Network Security, Java programs, Java security, JVM, Run-Time Access Controls, SecureClassLoader, SecurityManager, Web browser

The class loading mechanism plays a critical role in Java security since the class loader is responsible for locating and

Java Javascript Tutorial Tutorial

Java 2 Protection Domain and Permissions Model

March 25, 2020March 25, 2020 Krishna Java 2 Network Security, Java 2 Protection Domain and Permissions Model, Java 2 security model, JVM, Mapping in the Java Application Environment, protection domain, System Domain, The Java application environment

A protection domain can be scoped by a set of objects that are currently directly accessible by a principal, where

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Evolution of the Java Security Model

March 25, 2020 Krishna A Comparison of the Three Java Security Models, Class File Verifier, Cryptographic services for data confidentiality/integrity, Digital signature services for code signing, Evolution of the Java Security Model, Java 2 Network Security, Java 2 Security API, Java 2 Security Tools, Java Cryptography, Java security model, JDK 1.1 Security API, Lexical scoping of privilege modification, Lexical Scoping of Privilege Modifications, Resource access to local signed code, Resource access to remote signed code, Security manager, The Concept of Trusted Code in JDK 1.1, The Fine-Grained Access Control of Java 2, The jar and javakey Tools, The JDK 1.0 Sandbox Security Model, The Need for Java Security

The Java programming language is one of the fastest-growing technologies in use on the Internet today. The principal reason why

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