The objective of this article is to introduce the user to Secure Software Development Life Cycle (will now on be referenced to as S-SDLC). This article is written keeping in mind Project Managers, Program Managers, Developers, Architects and every individual interested in improving the security of product(s) developed by their organization(s).
Software Development Life Cycle (or SDLC) is the process which is followed to develop a software product.
A Software Requirement Specification or SRS is a document which records expected behavior of the system or software which needs to be developed. Software design is the blueprint of the system, which once completed can be provided to developers for code development.
Once the application development is completed, it is tested for various issues like functionality, performance, and so on.
Current trend is to identify issues by performing a security assessment of applications after they are developed and then fix these issues. This cycle of Testing – Patching – Re-testing runs into multiple iterations and can be avoided to a great extent by addressing issues earlier in the Life Cycle. There are people out there whose only intention is to break into computer systems and networks to damage them, whether it is for fun or profit. Phases of the software development life cycle (SDLC) are explained step-by-step, as are iteration concepts, in Robin Goldsmith's expert response to a tester's question. Regardless whether it's conducted explicitly, every project includes a Feasibility Analysis phase, because that's when the project management life cycle Initiation, Planning, and Organization phases occur. Life cycles are defined to help one succeed, not to create a mass of bureaucratic busywork.
Moreover, testing is more effective when it is planned and designed as much as possible during design, prior to development.
Using the life cycle to guide one's work, when applied in an informed and flexible manner, indeed can increase chances of success. The bulk of a systems project is spent identifying requirements, designing the system or product to be created, and then developing the system as designed by programming and testing that the programs meet the design.

Instead they characterize implementation as the end of development, which places a premium on hitting a deadline without taking into account adequately the impact on costs of supporting whatever they've too often rushed into production.
During the later Systems (or Requirements) Analysis phase, the top-level business requirements are driven down to detail, which then becomes the basis for high- and low-levels of System Design. The Product Security Baseline (PSB) requirements define the security-related functionality, development process, and documentation expectations for all Cisco products.
Some markets and industries, such as finance, government, and medical, place additional security requirements on Cisco customers.
Veteran developers know that coding and implementation errors can create security vulnerabilities. All Cisco development teams are expected to deploy these security checkers, review any warnings that are generated, and fix high-priority issues. Vulnerability testing helps ensure that all Cisco products are tested consistently for security defects.
We use of a variety of security tools from multiple sources to execute an effective security test plan. This article is written as a starter document for people who want to integrate security into their existing software development process.
Time taken to complete the development depends on the size of the application and number of programmers involved. While employing a team of ethical hackers helps, having processes like S-SDLC can help organizations in addressing the above discussed issues in a much more cost-efficient manner as identifying security issues earlier in the development life cycle reduces the cost.
We have been training Information Security and IT Professionals since 1998 with a diverse lineup of relevant training courses. A life cycle describes a way, most commonly a sequence of phases or major events and activities, that has been found to lead to success in some endeavor. Closure occurs when the development project is considered completed, typically after all the key functionality has been implemented. In addition, as commonly carried out, projects following various iterative development methodologies generally suffer from a second Feasibility Analysis phase form of inadequacy.

Few methodologies explicitly identify test planning and design as important life cycle activities, especially not as part of System Design prior to Development.
There are life cycles for all kinds of things, including life: you're born, grow up, go to school, earn a living, raise a family, retire, and die.
Unit, integration, and system testing of developed code should be integrated with the development of the code, which further helps catch errors earlier when they are easier and cheaper to fix. Conversely, a big project may be broken into several sub-projects, each of which is treated as a separate project, follows the life cycle, and can have its own iterations and increments.
Our Security Test Package combines them all into a single, easy-to-install collection of tools. In the past 16 years, over 50,000 individuals have trusted InfoSec Institute for their professional development needs!
The life cycle most of us probably are most familiar with is the system development life cycle (SDLC), which is closely allied with the project management life cycle. In contrast, most iterative development simply plunges into coding pieces of the product without suitable prior planning to determine what pieces are needed, how they will fit together, and what the most appropriate sequence is for creating and integrating them.
Most organizations make the mistake of failing to include the operations and maintenance phase in their life cycle. Agile development is at the other extreme, focusing on very small pieces of functionality and revisiting and reworking much of what already has been done.
Stake holders will differ from organization to organization based on the software development approach that it follows. Instead, they start with the high-level design of the product, system, or software they expect to create and thus have no meaningful basis for assuring it will provide value, let alone reliably measuring its financial ROI.
When used effectively, such methodologies perform overall product planning during Feasibility Analysis to identify and sequence the requirements, design, and development iterations needed.

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