security analysis ebook

Android Security Special-Apk reinforcement Analysis 0x00 I am not going to be ugly about the principle part. The above three articles are very clear. I am going to discuss how to implement the reinforcement process from 0, and I have stepped on a lot of pitfalls.0x01 The first step is to create the reinforced Apk, which is your source Apk. Your job is to prevent this Apk from being cracked. Note the fol

operation is only locked, while only one thread can perform the write operation, and the read operation is unrestricted, allowing multi-threaded concurrent reading, there may be non-repeatable read, such as a long duration of the read thread, the interval between reading the array at the same index location of data, exactly in the two read time, A thread modifies the data at that index, causing it to be inconsistent with the data that the thread reads back and forth at the same index. is to rea

browsers, scenario 3 is not an estimate.Only scenario 2 The most reliable, first own access to a website, get their session ID, and then put this sessionid stitching in the URL to send others to visit, as long as that person a login, we are equivalent to log on2. What is the vulnerable JavaScript libraryThe Fragile javascrpts LibraryI didn't get a detailed explanation on the Internet either.In my understanding this method is to replace the use of JS Library, or modify the relevant JSMedium prob

The security of the cluster mainly considers the following aspects: Isolation of the container from the host; Limiting the ability of containers to adversely affect infrastructure and other containers; The principle of least privilege--to reasonably restrict the permissions of all components, to ensure that the component only performs its mandated behavior, limiting the scope of the permissions it can achieve by restricting the ability of

This app is the love of countless otaku, also known as the "gun artifact", its registered users have reached 80 million, but heard that they are very strict protection of the app, to prevent users from packaging two times. Now let's analyze How secure this app is . First, we analyze the next two packaging protection, we first go online to find the app's installation package, unpacking-- > Pack-and-run. found that when we log in, we will be prompted that the signature information is inconsistent,

Address: http://pan.baidu.com/s/1dFhBu2d Password: peasTurn a play code, more than 200 lessons! This course is for the MVC5 version of ASP. NET MVC, but also involves too much of the underlying implementation of content, so most of them can not find out-of-the-box resources, mostly from the instructor's analysis of the source code and test proof, there are shortcomings, please understand, each chapter of this course will provide a series of examples o

{ uint size; map_item list [size]; } struct map_item { ushort type; ushort unuse; uint size; uint offset; } Map_list first with a uint description is followed by a size map_item, followed by a corresponding size Map_item description. The MAP_ITEM structure has 4 elements: type denotes the map_item, Dalvik the definition of type Code in executable Format; Size indicates the number of the type to subdivide this item, and offset is the offset of the first

(bprm->cap_effective);/* To support inheritance of root-permissions and Suid-root * EXECU Tables under Compatibility Mode,We raise all three * capability sets for the file. * If only the real uid was 0, we only raise the inheritable * and permitted sets of the executable file . */if (!issecure (secure_noroot)) {if (Bprm->e_uid = = 0 | | current->uid = = 0) {cap_set_full (bprm->cap_inheritable ); Cap_set_full (bprm->cap_permitted);} if (Bprm->e_uid = = 0) cap_set_full (bprm->cap_effectiv

This article mainly introduces the security principle of using the addslashes function escape in PHP, and analyzes the usage of the addslashes function and the limitations of the ecshop user-defined function addslashes_deep, which is very useful, for more information about how to use the addslashes function escape in PHP, see the following example. Share it with you for your reference. The specific analysis

Phpsession security problem analysis therefore, our main solution is to verify the validity of the session ID. Reference content is as follows: The code is as follows: If (! Isset ($ _ SESSION ['User _ agent']) { $ _ SESSION ['User _ agent'] = $ _ SERVER ['remote _ ADDR ']. $ _ SERVER ['http _ USER_AGENT']; } /* If the user's session ID is forged */ Elseif ($ _ SESSION ['User _ agent']! = $ _ SERVE

JVM virtual machine: The instruction set is a 0-address instruction set, that is, the source and target parameters of the instruction are implicit and passed through a data structure "evaluation stack" provided in the Java Virtual machine.Dalvik also maintains a PC counter and call stack for each thread when the virtual computer is running, and this call stack maintains a list of registers that are given in the registers field of the method structure, and the DVM creates a list of virtual regist

Therefore, our main approach is to validate the validity of session ID. The following is the referenced content: Copy the Code code as follows: if (!isset ($_session[' user_agent ')) {$_session[' user_agent '] =$_server[' remote_addr '].$_server[' http_user_agent '];}/* If the user session ID is forged */ElseIf ($_session[' user_agent ']! = $_server[' remote_addr ']. $_server[' Http_user_agent '] {SESSION_REGENERATE_ID ();}?> The above introduces the PHP session PHP session

Complete analysis of Android security attack and defense, decompilation and obfuscation technologies (I) I have been hesitant to write this article before. After all, it is not proud to decompile other programs. However, from a technical point of view, it is indeed a very useful skill to master the decompilation function, which may not be used very often, that's a headache. In addition, since someone else c

fail-fast iterator, and Hashtable's enumerator iterator is not fail-fast. So when there are other threads that change the structure of the HashMap (add or remove elements), the concurrentmodificationexception will be thrown, but the remove () of the iterator itself The Concurrentmodificationexception method removes the element without throwing an exception. But this is not a certain behavior, depends on the JVM. This one is also the difference between enumeration and iterator. Because Hasht

Tags: alt padding command ble language jump Edit RDA SystemStack traceFirst edit a program Compile with GCC, then debug with GDB and find GDB has not been downloaded Re-run gdb after download Set Breakpoint: B + line number or "main" Run: R Frame: The printed information: the stack's layer number, the current function name, the function parameter value, the file and line number where the function is located, and the statement to which the function executes. Info frame: Print out informatio

Zuul as a business gateway needs to control its internal services, the use of OAUTH2 resources server integration into the Zuul can be very good protection of Zuul internal services, need to build a service registry, certification center, authentication Center, three major sections, The authentication center is integrated with Zuul to act as a façade design, Zuul to determine which services need token which do not need.Service registry: Drei-eureka-server, this project is a eureka-server server,