Você está fazendo malabarismos com vários projetos de aplicativos da Web. Como você decide quais medidas de segurança priorizar?

Risk assessment should be thought of as a living process. As you build out more features and functionality you should constantly be evaluating any security risks you may be introducing and re-evaluating any previously identified risks that your changes may affect.

First and foremost, it depends on the organization and business. Selling, publishing, Receiving...etc. Also, compliance matters based on the geography of the organization. The question is very general, however; the most common or authorization, risk analysis depending upon what we planned to achieve. The most common thing we all miss are the injections and directory traverse checks.

Even though you are working on multiple projects, security requires undivided attention as it jeopardizes the organization integrity during an incident or breach. Key to a secure application development is creating robust building blocks (functions, classes, API, web services, etc) that have been thoroughly tested over and over again. These common services will help guide uniformity in security controls and coding best practices. With cloud, we are integrating multiple SaaS modules but we must ensure that data handshakes and exposure within the components is traceable and logged to raise alerts when anomalies are detected

Prioritize security measures based on the sensitivity of the data handled by each application, the potential impact of a breach, compliance requirements, and the likelihood of specific threats. Start with robust authentication, data encryption, and regular security audits, then address application-specific risks.

To prioritize security measures across multiple web application projects, start by identifying the most critical assets and data that need protection. Assess the potential risks and vulnerabilities specific to each project. Focus on implementing security measures that address the highest risks first, such as securing authentication and data encryption. Regularly update and patch software to prevent known exploits. Finally, establish consistent security practices and conduct regular audits to ensure ongoing protection across all projects.

User authentication is another area I prioritize, especially for applications that handle sensitive data or have administrative functions. Implementing multi-factor authentication (MFA) is a must because it adds an extra layer of security beyond just a password. I typically combine something the user knows, like a password, with something they have, like a mobile device for a one-time code, or something they are, like fingerprint or facial recognition. This makes it much harder for unauthorized users to gain access, even if they somehow manage to get hold of a password. By prioritizing strong user authentication, I can better protect the applications from unauthorized access, which is crucial when managing multiple projects.

For applications that handle sensitive information or grant access to administrative functions, MFA is not just an option—it's a necessity. It drastically reduces the risk of unauthorized access, even in cases where passwords may be compromised. Invest in MFA and strengthen your security !

User authentication is a security process that verifies the identity of a user attempting to access a system. It involves checking credentials, such as usernames and passwords, or using more advanced methods like biometrics, two-factor authentication (2FA), or OAuth. Strong authentication reduces the risk of unauthorized access and data breaches. Best practices include enforcing strong password policies, using multi-factor authentication, and securely storing credentials using techniques like hashing and salting. Proper implementation ensures that only authorized users can access sensitive information and system resources.

Strong user authentication is essential for web application security. Prioritize implementing multi-factor authentication (MFA) to enhance protection beyond passwords alone. MFA combines multiple elements: something the user knows (e.g., a password), something they have (e.g., a mobile device), and something they are (e.g., biometric verification). This additional layer of security is crucial for applications handling sensitive information or administrative functions, as it greatly reduces the risk of unauthorized access, even if passwords are compromised.

Data encryption is the 1st priority in the security of any web applications. Accessing sensitive data through the authorization and tokens generations to secure.

Data encryption requirements are often, but not always, the driving force of architecture design. Web apps with specific data encryption requirements are typically priority number 1 as they impact API design & database selection from the onset. These requirements typically are outlined at the risk assessment level and theoretically may vary among each use case and web app. If possible, select a nimble data platform with the capacity to offer the latest advances & security measures as advances in data encryption are happening very quickly. For ie., Swift released their open source homomorphic encryption package 2 weeks ago, & now, data sensitive healthcare related AI applications are viable. Maintain objectivity, reserve spontaneity.

Data encryption is the process of converting plain text into a coded format (ciphertext) to protect sensitive information from unauthorized access. It ensures that even if data is intercepted, it remains unreadable without the proper decryption key. Encryption can be applied to data at rest (e.g., files on a disk) and data in transit (e.g., information sent over the internet). Common encryption methods include AES for symmetric encryption and RSA for asymmetric encryption. Implementing strong encryption practices is essential for securing sensitive data, such as personal information, financial details, and confidential communications.

Encrypting sensitive data, both at rest and in transit, should be a top priority. Use Transport Layer Security (TLS) protocols to secure data during transmission. For data at rest, implement database and file system encryption methods. Encryption serves as a critical last line of defense, ensuring that intercepted or unauthorized access to data renders it unreadable and useless without the proper decryption keys. Focus on encryption for applications handling personal identifiable information (PII), financial details, or intellectual property to maintain data confidentiality and integrity.

When juggling multiple web application projects, prioritizing code security is essential because it addresses vulnerabilities right at the source. I make sure to conduct regular code reviews and enforce secure coding practices across all projects. For example, I use automated tools to scan the code for common security issues like SQL injection and cross-site scripting (XSS). It’s also critical to keep third-party libraries and dependencies up to date to ensure they don’t introduce any known vulnerabilities into the project. Even if you have strong external defenses, flawed code can still open the door to attackers, so it’s crucial to make code security a top priority.

But secure coding doesn't stop at your codebase. It also involves keeping third-party libraries and dependencies up to date and free from known vulnerabilities. Remember, even the most advanced perimeter defenses can be compromised if the application code itself is flawed. Secure your code, and you'll secure your entire application.

Code security involves practices and techniques to protect software from vulnerabilities that attackers can exploit. This includes writing secure code, avoiding common pitfalls like SQL injection or cross-site scripting (XSS), and regularly reviewing and testing the code for weaknesses. Secure coding practices involve validating user inputs, managing errors without revealing sensitive information, and following the principle of least privilege. Additionally, using tools like static code analysis, conducting code reviews, and staying updated on security patches are crucial for maintaining code security throughout the development lifecycle.

Prioritize code security to address vulnerabilities from the outset. This involves conducting regular code reviews, adopting secure coding practices, and using automated tools to detect common security issues like SQL injection or cross-site scripting (XSS). Secure coding entails not only writing resilient code but also ensuring that third-party libraries and dependencies are up to date and free from known vulnerabilities. Even the most effective perimeter defenses can be undermined if the application code has inherent flaws.

One of the most effective strategies is to adhere to the principle of least privilege (PoLP)—grant users only the access necessary to perform their specific roles. This approach significantly reduces the risk of data breaches, especially from internal threats or compromised accounts. By prioritizing strict access controls and PoLP, you safeguard your application against unauthorized access, protecting both your data and your users.

Access controls are security mechanisms that regulate who can view or use resources in a system. They ensure that only authorized users can access specific data, applications, or functions, based on their roles or permissions. Access controls can be implemented through mechanisms like role-based access control (RBAC), discretionary access control (DAC), and mandatory access control (MAC). Effective access control involves defining clear user roles, granting the minimum necessary privileges, and regularly auditing permissions. This prevents unauthorized access, reduces the risk of insider threats, and protects sensitive information.

Monitoring and response are critical components of a security strategy, focusing on detecting and addressing security incidents in real-time. **Monitoring** involves continuously tracking system activities, network traffic, and user behavior to identify suspicious actions or anomalies. Tools like intrusion detection systems (IDS) and security information and event management (SIEM) solutions are commonly used. **Response** involves having a plan in place to react swiftly to incidents, including isolating threats, mitigating damage, and conducting post-incident analysis. Together, they help minimize the impact of security breaches and maintain system integrity.

To know which applications to focus, first you need to know the protection requirements of the applications. Based on the protection requirement, OWASP DSOMM can help to identify which measures are to be prioritized. The low protection requirement applications needs only DSOMM level 1 measures to implement, while high protection requirement application need to reach measures from level 3-5.