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Information Security System Design Foundation Fifth Week study summary"Learning Time: 10 hours""Learning content: Chapter III: Machine Representation of the program"First, the contents of the textbook 1. Changes in X86 addressing modes:1 The flat mode of the DOS era, does not distinguish between user space and kernel space, very insecure;2 8086 sub-mode;3 IA32 Flat mode with protected mode2. Two kinds of ab
20145326 Cai "The basis of information security system design" 12th Week study summary of learning Contents
Summary of the Nineth Week learning content
Summary of the tenth week learning content
Summary of the 11th Week learning content
Video learning and practice pointers and statementsThe declaration of a variable in the C language consists of two parts:
Type
Declarator
20145321 "The basis of information security system Design" 7th Week study summary textbook study content summary sixth chapterA memory system is a hierarchical structure of storage devices with different capacities, costs, and access times.6.1 Storage TechnologyThree common storage technologies: ram/rom/disk(1) Random access memory RAM
There are two categories: Static RAM (SRAM) and dynamic RAM (DR
20165230 2018-2019-1 "Information Security system Design Fundamentals" The second week study summary of learning Contents
There are two general rules for arranging the bytes of an object: The small-end method (least significant byte at the front) and the big-endian (the most significant byte in front).
The expression x>>k will shift the X arithmetic right to K (the left side complements the K-effectiv
2018-2019-1 20165334 "Fundamentals of Information Security system Design" Third week study summary and Buffer Overflow Vulnerability experiment One, instruction learning gcc -Og -o xxx.c learns to -Og tell the compiler to use an optimization level that generates machine code that conforms to the overall structure of the original C language code. gcc -Og -S xxx.cLearning ( -S option to view compiled code gen
20145235 "Information Security system Design Fundamentals" No. 09 Week Study summary _1 Exercise 10.1The first problem is usr/include inside no csapp.h and csapp.c downloaded a compressed package from the night, and to understand the pressure tar-xf Code.tarThen put the inside of the Csapp.h and csapp.c into the usr/include inside.Then compile and run c101.c. The descriptor return value is 3.Code HostingImp
-2018-2019-1 20165206 "Information Security system Design Fundamentals" 4th Week Study summary-Textbook learning content Summary
Programmer-Visible state: Each instruction in the Y86-64 program reads or modifies portions of the processor state, which is known as the programmer's visible state. Includes: program register, condition code, program status, program counter, and memory.
Y86-64 direct
-2018-2019-1 20165206 "Information Security system Design Fundamentals" 3rd week Study summary-Textbook learning content Summary
Program code: The GCC command invokes a complete set of programs to convert the source code into an executable file.First, the C preprocessor expands the source code;Second, the compiler produces the source file assembly code;The assembler then converts the assembly code
20145306 "Fundamentals of Information Security system Design" 14th Week study summary textbook Learning content Summary physical and virtual addressingPhysical addressing: The main memory of a computer system is organized into an array of cells consisting of m contiguous byte sizes. Each byte has a unique physical address of Pa. The address of the first byte is 0, the next byte has an address of 1, the next
20145336 Zhang Ziyang "The foundation of Information security system Design" 14th Week study Summary Learning goal
Understanding the concept and role of virtual memory
Understanding the concept of address translation
Understanding Memory Mappings
Mastering the method of dynamic memory allocation
Understand the concept of garbage collection
Understanding memory-related errors in
1. Security Goal-Confidentiality-Integrity-Availability-Authenticity-Non-repudiation-Authorisation-Accounting2. CryptographyVery large topic,,, a lot of information on the web. Recommend a few good books.Understanding Cryptography, Christof PaarSecurity Engineering for vehicular IT Systems, Marko Wolf3. Cryptographic Libraries3.1. Business LibraryProviders: Escrypt, POLAR SSL, Crypto Vision, Easycore, Elekt
decryption, until it can no longer be decrypted with Base64, the number of memory decryption, found key. The script is as follows:Import base64def base64count (src): ret = 0try:while true:src = base64.decodestring (src) ++retexcept Exception, E:return SrcAnswer: jkljdkl232jkljkdl23894, it is said that MD5 encryption is very safe, really?e0960851294d7b2253978ba858e24633Solution: online MD5 decryption take key. Answer: BIGHP5. Racial discrimination (http://lab1.xseclab.com/base1_0ef337f3afbe42d56
2018-2019-1 20165228 "The foundation of Information security system Design" experimental report on Buffer Overflow Vulnerability Experiment Introduction:Buffer overflow attack: by writing to the program's buffer beyond its length content, causing buffer overflow, thereby destroying the program's stack, causing the program to crash or to make the program to execute other instructions to achieve the purpose o
20145235 "Fundamentals of Information Security system design" NO. 06 Week study summary _014.1.4 Y86 anomalySome values for the visible status Code stat:1:AOK program performs normally2:HLT indicates that the processor executed a halt instruction3:adr means that the processor reads from an illegal memory address or writes to an illegal memory address.4:ins indicates that an illegal instruction was encounter
2018-2019-1 20165316 "Information Security system Design Fundamentals" the second week to summarize the learning contents of the teaching materials
Small end, low address to low, high address to high; You can determine the size and end type of a machine by forcibly extracting a byte of storage from either the cast or union.
A logical operation has only 0 or 12 results, while bit-level operation
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