Software Security Testing

Software Security Testing

Security testing software – Integrated Assessment of vulnerability to attacks of various kinds. This type of testing is fundamentally different from the functional (load, regression, etc.). Particular attention is given to cases in which the software generates an error, and assess the effects of errors in terms of protecting information from unauthorized access, hacking and other attacks.

Basic parameters for checking software security

The basic set of parameters covered by security testing are:

  • Access control
  • User authentication
  • Validation of input
  • Reliability of information encryption
  • Correct handling errors
  • Buffer overflows
  • Server configuration

Testing access control, developers identify defects that could allow unauthorized access to applications.This may be deliberate introduction of errors used to break into the system during recovery attempts to guess the password by external means, and more.

Security check authorization helps detect defects associated with authentication of individual users and groups.

Testing data validation ensures that the database is stored only The valid information (e-mail addresses of users, etc.).

Reliability data encryption – one of the most important parameters of any software which is used to generate, store and forward confidential information. During testing, you must make sure that the systems encrypt and decrypt data, scanning and recognition of electronic signatures are no errors that can lead to cracking.

Verifying the error-handling code snippets into account the findings as they occur. Also studied the possibility of unnecessary disclosure of information when a malfunction in the system and the effects of errors for all software performance.

Due to buffer overflow information can also get in the open access. In most programming languages ??use the technology stack frames when the program data and control data are mixed in the process stack. Buffer overflow and the program hangs attacker can load machine code on its behalf.

Server configuration is checked for faults in multithreaded environments that can lead to data corruption and incorrect use. This is especially true for programs that run through automation of business processes .

Testing Methodology

In the process of testing the safety test acts as a cracker. Using special software and hardware, it tries to take all measures to ensure that:

  • Learn passwords
  • Attack the system using tools for analyzing security
  • Penetrate the system by entering the wrong data and using it to restore access,
  • Find authorization key using unclassified information. and other ways to crack the software.

Load testing and performance optimization

Load testing and performance optimization

Load testing software – is performance testing, which allows you to determine the speed with which the program is running under a certain load. As a result of product performance is evaluated compliance with the requirements laid down in the TOR.

Application testing and its specificity

Most often, stress tests are used for multi-user software products supporting architecture “client-server”, but can also be used for other types of software. Such testing may be subject to CRM-system is performing automation of business processes or accounting software, which generates report documentation database for several years, or text editor to handle a large volume of documents.

During testing, software withstand various loads, including prolonged and the peak. Through a series of tests, developers mimic actions of a certain number of users (virtual) in the program and its individual sections.

To evaluate the performance of the software may also be carried out so-called stress tests, when the load exceeds the norm. With it is determined during queries on the maximum load. Concept of stress testing is often identified with the load, but they are two different types of work.

As the evaluation criteria used by the performance requirements for software, formulated at the stage of its development. If these requirements were not included in the project documentation, testing will be based on the estimated averages.

Principles of exercise testing

Any load testing involves consideration of a number of the principles set out below:

  • Unique queries
  • Response time
  • Dependence of response time on the degree of distributed systems,
  • Response time spread,
  • Fidelity load profiles.

The uniqueness of requests. When formulating scenarios system developers need to take into account that there are exceptions to any scenario. The principle of using the program are generally determined by the statistics. But if the majority of users use a similar algorithm, there will always be people who do otherwise, and their likely questions should also be considered in the testing.

System response time is calculated by statistical, using the normal distribution function. Terms obtained data, developers determine the approximate time interval.

Dependence of response time on the degree of distributed systems. number of user queries relating to each node, as well as the number of nodes affect the range of processing time. Each node adds a certain proportion of the delay in time for processing.

Scatter response time. With a large number of measurements of time, there are always questions that require maximum processing time. This principle is taken into account in the performance requirements and regular performance tests.

Fidelity load profiles - parameter estimation in which testing can be very expensive if the product includes a number of components. The more complex the device software, the more aspects must be considered when developing and testing.

As with other tests, load carried by specially designed cases and scripts. The possibility of testing centers “Aplana” allow you to pick an effective solution for problems of any complexity.

Know More About Regression Testing

Know More About Regression Testing

Regression testing software – error detection on sites previously tested code. This type of testing is carried out after adjusting the program, which may include:

  • Correction of the defect,
  • Merging code
  • Migrate to a different operating system or database as well as any other changes.

The main aim of developers becomes verifying that changes made to the software did not lead to undesirable results (in particular, decreased functionality) and the program continues to meet the requirements.

Phases and tasks of regression testing

Typically, regression tests are performed in stages. First, developers need to find out what all the previously found problems corrected. The second – to determine not played any defects corrected again. The third – to check for failure in the functionality of the whole.

Errors discovered after the test source code and software corrections are called regression. To identify them mainly used the same methods as in the previous test system. A series of repeated tests used to confirm that the changes made to the software did not have a negative impact on its functionality and performance.

The main problem to be solved by regression testing :

  • Rapid detection and correction of errors affecting the functional software
  • Verification of compliance with the modified program requirements put in its development,
  • Maintaining the quality of software when it is amended.

Identification and elimination of regression errors are made ??after each modification program. This kind of testing refers to a complex and costly, but absolutely indispensable stages of software development of any complexity. It is used in areas such as automation of business processes , information systems and many other areas.

To test uses special test cases, which are written more in the initial stages of product development and testing.

Software Maintenance

Perform regression testing involves not only checking, but also further support software. To address the identified defects and flaws, as well as further extend the functionality of the program may be carried out three types of support:

  • Corrective,
  • Adaptive,
  • Progressive.

Corrective maintenance is performed, if the detected defects do not require changes to the software requirements specification. Error correction is aimed at maintaining the program operational.

Adaptive maintenance is carried out during the expansion of the functional software change data or runtime.

Progressive support – all treatments aimed at improving the efficiency of software. This type of support is also called improved.

As part of the adaptive and progressive testing system can add new modules. Terms of Reference with the modified. When corrective maintenance modification TK usually not required.

The main volume of tests performed in the development of any software is necessary on regression.Correction of some errors with very high probability leads to the appearance of others, and this is one of the main problems maintaining software.

Turning to the company “Aplana” You can order regression tests for software of any kind. At your request, testing can be carried out selectively or comprehensively.

Software Test Automation Reality

Software Test Automation Reality

Hello Dosto ( Friends ),

Autotests: Myths and Realities – “Automation: why do it?” stressed the importance of preparation and implementation of automated tests. In the same speech about the pitfalls faced in efforts to automate testing. We consider these in more detail.

Myth : Autotest able to completely replace manual testing. Reality : grounds to believe that approval will be exactly the same as to believe that there is no silver bullet . Self-tests can not be a panacea (and prevention) of all bugs living in the software product. Do you believe that stuffed with electronics robot is able to determine all the ailments of the human body and quickly get rid of them? That would be great. But in fact, intuition, experience, thinking the doctor will not replace such a robot. But he is able to deliver Aesculapius from routine actions that can be clearly defined and regulated. The same in testing .

Myth : Acquisition commercial use or develop their own free tool for writing automated tests is a guarantee of success in the field of Test Automation. Reality : The tool is not a strategy or even tactics. A complete understanding of exactly what, how, when and why we want to test . What are the goals we want to achieve in addition “to bugs was not”? Looking for help in TDD? Interested in regression tests? What functionality, at what level (GUI, API, kernel) we want to check the Autotest in the first place? How much time do we have, and will? How many specialists? What experience? All these and many other questions should be answered even if you select the tool. One thing – easily take the first step (“Oh, my program itself fills out the form!”) And stop at a crossroads, and another thing – consistently replenish library autotests that run with each build. You can not automate chaos. Tool – a tool and nothing more.

Myth : Autotest will significantly save on testing. Reality : Yes, allow it, because they do not need to check the same hand dozens of times. However, cheese is not free: the cost of implementing automated tests can be significant. Autotests eat do not ask, but you need to feed their creators :) And another thing: the creation of automated tests should be seen not so much from the standpoint of “invest now – and then save up to test” how to enhance product quality and speed of its development (subject to coverage and basic functionality regular runs automated tests). In other words, investment in automated testing – a movement forward, the desire not so much to save, how much to buy.

Myth : Posted autotests once, and you can use them until the end of the century. Reality : Certainly not. Product changes – changes and self-test. If the self test is tied to the GUI, then the changes in the user interface can lead to malfunction Autotest. A change of algorithms? A new feature in the product or switch to another API? And bugs found in Autotest (surprise)?

Myth : A well-written and updated self-tests are infallible. Reality : Autotest useful and paramount, but behind them need be watched. About traps in autotest we continue to talk to one of the following articles.