Tips for Improving Security in Software Development

Security mistakes are never theoretical once secrets hit a repository The moment an API key is committed the problem is no longer about Git It is about incident response A lot of developers think the fix starts with removing the key from the codebase or rewriting Git history That matters But it is not the first priority The first priority is assuming the secret is already compromised Experienced engineers respond in this order → Revoke or rotate the exposed key immediately → Check logs and usage to detect abuse → Remove the secret from the codebase → Rewrite history if needed to reduce future exposure → Update deployment and environment variables safely → Add guardrails so it does not happen again This is one of the biggest mindset shifts from junior to senior engineering Juniors often focus on cleaning the evidence Seniors focus on limiting the blast radius Because once a secret is exposed you cannot confidently assume nobody saw it That is why secret management matters so much in professional systems Good teams build processes that reduce the chance of human mistakes becoming production incidents → Store secrets outside source code → Use environment variables or secret managers → Add pre commit hooks and secret scanning → Limit permissions for keys and tokens → Rotate secrets regularly → Treat every exposed key as compromised Security maturity is not about never making mistakes It is about responding correctly when mistakes happen If a secret was exposed in your team today would everyone know the right order of actions Share your thoughts below Follow Nelson Djalo for practical lessons that help developers think like real software engineers #coding #programming #softwareengineering

Most product founders (or aspiring founders) think cybersecurity is something that can be added on as we go. In 2024, 68 % of breaches involved a non‑malicious human element, like misconfigurations or coding oversights. Security isn’t a checkbox at launch; it’s a mindset woven into every sprint, every pull request, every architectural decision. Here’s a playbook we, at GrayCyan, have developed: 1️⃣. Threat Model Upfront Before you write a single line of code, map out your attack surface. What data are you storing? Who could target it, and how? A lightweight threat model (even a few whiteboard sketches) helps you prioritize controls around your riskiest assets. 2️⃣. Secure Design Patterns Adopt proven patterns—like input validation, output encoding, and the principle of least privilege—right in your prototypes. Whether it’s microservices or monolithic apps, enforcing separation of concerns and privilege boundaries early means fewer surprises down the road. 3️⃣. Shift‑Left Testing Integrate static analysis (SAST), dependency scanning, and secret‑detection tools into your CI/CD pipeline. Automate these checks so that every pull request tells you if you’ve introduced a risky dependency or an insecure configuration—before it ever reaches production. 4️⃣. Continuous Code Reviews Encourage a culture of peer review focused on security. Build short checklists (e.g., avoid hard‑coded credentials, enforce secure defaults) and run them in review sessions. Rotate reviewers so everyone gets exposure to security pitfalls across the codebase. 5️⃣. Dynamic & Pen‑Test Cycles Complement static checks with dynamic application security testing (DAST) and periodic penetration tests. Even a quarterly or biannual pen‑test will surface issues you can’t catch with automated scans—like business‑logic flaws or subtle authentication gaps. 6️⃣. Educate & Empower Your Team Run regular “lunch‑and‑learn” workshops on topics like OWASP Top 10, secure cloud configurations, or incident response drills. When developers think like attackers, they write more resilient code—and spot risks early. 7️⃣. Plan for the Inevitable No system is 100 % immune. Build an incident response plan, practice it with tabletop exercises, and establish clear escalation paths. That way, when something does go wrong, you move from panic to precision—minimizing impact and restoring trust. At GrayCyan, we partner with founders (and upcoming founders that have amazing product ideas) to embed these practices as we build apps. If you’re ready to turn security from an afterthought into your competitive advantage, let’s connect. Drop a comment or send us a DM, and let’s bake trust into your next release. #DevSecOps #SecureByDesign #SecureDevelopment #DataProtection #TechStartups GrayCyan AI Consultants & Developers

Shipping secure software in the age of open source + AI (a CTO’s friendly rant) I love open source. I like AI copilots. I also enjoy sleeping at night. Those can all co-exist if we treat security like a product feature, not a hope and a prayer. Here’s the playbook we use that keeps speed high and risk low: 1) Standards beat vibes AI can draft and OSS can accelerate, but our coding standards decide what ships. Keep them in-repo, short, and enforceable: auth, crypto, logging, errors, secrets, retries. Examples over essays. 2) “Do you understand this diff?” If you can’t explain a change in two sentences, it doesn’t merge. PRs must state intent, radius, data touched, and auth/perm impacts. Reviewers say what they tested and not “looks good.” AI-generated code still needs human brain cells. 3) Let robots be relentless Every commit runs Static Application Security Testing (SAST), dependency/Software Bill of Materials (SBOM) checks, license policy, and secrets detection. 4) Dynamic Application Security Testing (DAST) on deploy Spin up the env and point DAST at it: auth flows, input fuzzing, headers, cookies, rate limits. Block on criticals/highs; auto-ticket the rest. If staging can’t handle our scanner, it won’t handle theirs. 5) Pen tests by experts in the field For every major release, bring in an external pen test. Fix, retest, publish the delta. Fresh eyes > familiar blind spots. 6) Open source ≠ open season Curate approved packages and minimum versions. Generate an SBOM on every build and fail on banned/CVE’d deps. Watch for typosquats and weird transitive stuff (yes, we still remember left-pad). 7) Secrets: not in code, not in logs, not in CI Central secret store, rotation, short TTLs, least privilege. Friends don’t let friends .env in prod. 8) Threat model like adults (30 mins) New feature? List 3–5 abuse cases and one control each. Data class, authz paths, rate limits, input validation. Done is better than ornate. 9) Logs > vibes Security-minded logging (no PII dumps), trace IDs, anomaly alerts. Add a sane WAF and rate limits. At 3 a.m., “we think it’s fine” isn’t telemetry. 10) AI with seatbelts No secrets in prompts. Human review for anything touching auth, crypto, or persistence. Prefer vetted patterns over clever one-liners the model dreamed up. My “no-ship” gates ✅ Standards linted in CI ✅ PR intent + risk explained, reviewer confirms understanding ✅ SAST/Deps/SBOM/Secrets scans (fail on criticals/highs) ✅ DAST on deploy (block on criticals/highs) ✅ External pen test for every major change (with retest) ✅ Centralized secrets; no secrets in code/logs/CI ✅ Quick threat model per feature ✅ Telemetry + WAF + rate limits live and monitored Ship fast. Ship secure. Sleep better. And if a robot blocks your PR then thank it, fix it, and keep your weekend. ☕️🛡️ Want a one-pager you can paste into your pipeline? Happy to share. #AppSec #OpenSource #AI #DevSecOps #Security #SBOM #PenTest #DAST #SAST #CTO #bTrade

Day 9 of MCP Security: Top 9 dev checklist items to build secure MCP Servers- 1. Structure and sanitize all user input before adding to prompts → Avoid direct string interpolation. Use templating and clearly defined variables. 2. Register only essential tools and enforce tool-level access → No generic "call-anything" agents. Tools must be explicit, minimal, and reviewed. 3. Treat system prompts like code: versioned, reviewed, auditable → Store in Git. Require PRs. A one-line prompt change can cause a full policy failure. 4. Log full agent context and decisions: prompt → context → tool → output → This is your only audit trail. Without it, you’re blind during incidents. 5. Write automated prompt tests in CI (edge cases, malicious inputs, reasoning traps) → Prompt failures are business logic failures. Catch them before prod. 6. Scrub sensitive data from injected context and agent memory → No tokens, PII, internal notes. Memory must be minimal and expirable. 7. Gate high-impact actions with review or confidence thresholds → No auto-refunds, mass updates, or API writes without safety logic. 8. Default to inaction when the model is uncertain or underinformed → Build the "safe failure" path - defer to human, escalate, or log-and-stop. 9. Disable unused tools and unexposed APIs by default → Every tool the agent can “see” is a surface. Keep tool registration lean and explicit. No unvetted access.

Security can’t be an afterthought - it must be built into the fabric of a product at every stage: design, development, deployment, and operation. I came across an interesting read in The Information on the risks from enterprise AI adoption. How do we do this at Glean? Our platform combines native security features with open data governance - providing up-to-date insights on data activity, identity, and permissions, making external security tools even more effective. Some other key steps and considerations: • Adopt modern security principles: Embrace zero trust models, apply the principle of least privilege, and shift-left by integrating security early. • Access controls: Implement strict authentication and adjust permissions dynamically to ensure users see only what they’re authorized to access. • Logging and audit trails: Maintain detailed, application-specific logs for user activity and security events to ensure compliance and visibility. • Customizable controls: Provide admins with tools to exclude specific data, documents, or sources from exposure to AI systems and other services. Security shouldn’t be a patchwork of bolted-on solutions. It needs to be embedded into every layer of a product, ensuring organizations remain compliant, resilient, and equipped to navigate evolving threats and regulatory demands.

𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐢𝐬 𝐧𝐨 𝐥𝐨𝐧𝐠𝐞𝐫 𝐚 “𝐟𝐞𝐚𝐭𝐮𝐫𝐞” - 𝐢𝐭’𝐬 𝐚 𝐟𝐨𝐮𝐧𝐝𝐚𝐭𝐢𝐨𝐧. Whether you’re building a simple app or a complete enterprise system, security must live at the core of your software development process. In today’s world of constant cyber threats, data leaks, and system vulnerabilities, a single weak point can cost a business its reputation, users, and even legal compliance. That’s why security needs to be part of every stage of the SDLC - from planning to deployment and long-term maintenance. 💡 𝐒𝐨 𝐰𝐡𝐲 𝐢𝐬 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐢𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭? Protects sensitive data (confidentiality) Ensures data integrity and reliability Keeps systems available and resilient Builds user trust and brand credibility Reduces long-term cost by preventing breaches Helps meet compliance and regulatory standards 🔧 𝐖𝐡𝐞𝐫𝐞 𝐝𝐨𝐞𝐬 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐟𝐢𝐭 𝐢𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭? 𝐄𝐯𝐞𝐫𝐲𝐰𝐡𝐞𝐫𝐞. In planning, we identify risks. In design, we choose secure architecture. In coding, we follow secure coding practices. In testing, we run security scans and penetration tests. In deployment, we secure servers, APIs, and credentials. In maintenance, we patch and monitor continuously. 🔒 𝐇𝐨𝐰 𝐝𝐨 𝐰𝐞 𝐬𝐞𝐜𝐮𝐫𝐞 𝐨𝐮𝐫 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞? Some key approaches: Secure coding & code reviews Input validation and protection against common attacks Proper authentication & authorization Cloud & infrastructure security (firewalls, API Gateway, secrets management) DevSecOps: embedding security into CI/CD Encryption for data at rest and in transit Role-based access control & MFA Regular vulnerability scanning & penetration testing Clear security policies and team awareness At the end of the day, security is not a checkbox - it’s a culture. If we build with security in mind from day one, we build software that users trust and businesses can rely on.

Security doesn't depend on Dev for vulnerabilities to exist. But… 1. Dev depends on Security for compliance sign-off. 2. Ops depends on Security for deployment approvals. 3. Product depends on Security for feature releases. 4. Business depends on Security for customer trust. The entire delivery pipeline hinges on how Security operates. Yet some Security teams treat developer experience like it's not their problem. Slow approval processes that take days. Unclear requirements that change mid-sprint. Manual checks that could be automated. Security gates that block without clear remediation paths. "We found issues" without explaining what or how to fix. "This can't go to production" without alternative solutions. "That's not secure" without documented standards. Then they wonder why developers route around security controls. Why shadow IT emerges. Why technical debt piles up. Why vulnerabilities slip through. Here's what actually works: 1. Clear security guidelines before development starts. 2. Automated security checks in the CI/CD pipeline. 3. Fast feedback loops with actionable results. 4. Self-service tools that don't require security approval for every change. 5. Documentation that developers can actually follow. 6. Risk-based prioritisation instead of blocking everything. Security should enable delivery, not prevent it. Your job isn't to say no. It's to show developers how to say yes securely. Build guardrails, not roadblocks. Automate gates, don't add manual checkpoints. Provide tools, not tickets. When Security becomes a bottleneck, the business moves on without you. When Security enables velocity, you become indispensable. The best Security teams make secure development the path of least resistance. They understand that developer experience is security's problem too. Because if it's hard to do securely, people will do it insecurely. Make security easy, fast, and clear. Or watch your controls get bypassed

Shift left is NOT dead! It’s just become misunderstood for some reason. Let’s clear it up: Shift left in cybersecurity simply means adding security habits earlier in the software development lifecycle (SDLC). It means implementing proactive security habits closer to design and coding, rather than ONLY reacting once software is already in production. But here’s the key: To shift left effectively, you should first "start right". Start Right: Build visibility, monitoring, and resilience in production - Monitor for real-world threats and attacks - Respond to and fix actual exploitable production vulnerabilities (found via pentests and bug bounty findings) - Track the cost and impact of security incidents Then, use root cause analysis to connect these incidents to upstream opportunities for prevention, so you can make the case for... Shift Left: Move prevention and awareness earlier in the lifecycle - Conduct architecture reviews and regular threat modeling - Define security requirements and apply secure coding practices - Deliver secure code training - Implement pre-production scanning (SAST, SCA, etc.) Once both the right-side and left-side controls are in place, you have successfully shifted "everywhere" - the ultimate goal! But let’s be clear: “Shift everywhere” does NOT mean pushing the security responsibilities onto the developers. It means building effective security controls into the SDLC itself, with well defined shared responsibilities across: - Developers - Security - Product and Project Managers - Engineering leaders …and anyone else involved in shipping software This all will require CHANGE to your organization's habits and culture, which takes time, and a whole lot of patience. You’ll need allies. You’ll need security champions. Your security team can’t do this alone. Start right → Shift left → Shift everywhere! #applicationsecurity #productsecurity #softwaresecurity #securitychampions #securityculture #proactivesecurity #devsecops #developerexperience #shiftleft #shifteverywhere #sdlc

We've been talking about AI accelerating development, but there's another side to consider: AI doesn't just write code faster - it writes vulnerable code faster too. AI models were trained on decades of code from Stack Overflow and GitHub repos, including all the bad examples. When you ask AI to "build a user login system," it might give you something that works perfectly but stores passwords in plain text. Traditional code reviews often miss this. Your senior developers are focused on logic errors and performance issues, not spotting security anti-patterns in AI-generated code blocks they didn't write themselves. The solution is being proactive with your AI interactions. Whether you're using Claude Code with a claude.md file or AWS Q with custom rules in the .amazonq/rules folder, define your security requirements upfront. For example: "Never store passwords in plain text. Always use bcrypt or similar hashing. Include input validation for all user data. Follow OWASP guidelines for authentication." Treat your AI code like third-party libraries. You wouldn't deploy external dependencies without security scanning, so why treat AI-generated code differently? Include tools like Semgrep and CodeQL directly in your CI/CD pipeline - make security scanning a required gate, not an optional review step. The speed advantage of AI development only works if you can deploy safely. Getting this right means building security into the development process, not bolting it on afterward. #CyberSecurity #AICodeAssistant #TechLeadership #CIO #SecureCode #DevSecOps #RiskManagement #SoftwareDevelopment

A bonus post this week - 🥳 Here's another great example of how AI is reshaping and expanding the role of CISOs, especially within the supply chain and critical infrastructure sectors. LLMs like ChatGPT, CodeWhisperer, and others are hallucinating non-existent packages when generating code. Attackers are now registering those fake packages (aka “slopsquatting," what a fun name, eh?) to deliver malware into real development pipelines. It's a mistake to think of "slopsquatting" as a DevSecOps issue. Developers may be the ones pulling packages, but CISOs are ultimately responsible for identifying the enterprise exposure, making recommendations to control / reduce the risk, and will be called to question as to why more wasn’t done to realize, and mitigate this risk if something happens. [Ahh...the life of the modern CISO...] According to an article in SecurityWeek (link in the comments) researchers found over 205,000 hallucinated packages from 16 models. Some open-source LLMs had hallucination rates above 20%. That’s not fringe. That’s mainstream. So what can a CISO do about it? Some quick recommendations: - Mandate an Internal Mirror for Package Repos Enforce use of internal mirrors or package proxies. These allow your security team to whitelist vetted dependencies and block packages not explicitly reviewed, even if hallucinated ones are published upstream. - Implement Rigorous Dependency Validation Establish protocols to verify the authenticity of all third-party packages, particularly those suggested by AI tools. It's not enough to "set it and forget it" with AI. It may be a fast team member, but that doesn't mean it’s always the most reliable or competent. When possible, utilize tools that cross-reference packages against trusted repositories to detect anomalies. - Improve (start) and Specify Your Developer Training Educate development teams about the risks associated with AI-generated code and the importance of scrutinizing suggested dependencies. Encourage a culture of skepticism and verification. -  Integrate LLM-Aware SCA and SBOM Enforcement Update your SCA tools and SBOM policies to flag new, low-trust, or previously unseen packages. This helps to catch LLM-influenced packages with low install counts or no public audit trail before they become production vulnerabilities. - Issue Secure Coding Guidelines for LLM-Generated Code Publish and stringently enforce internal guidance on using LLMs for code generation - including requirements for validating any dependencies suggested by AI tools. Make this part of your SDLC and annual developer training. Periodically audit for compliance when able. There is no "annual review" luxury in the age of AI-powered threats. As always, I welcome any additional insights or suggestions on how CISOs can be more proactive and empowered in reducing supply chain vulnerabilities. Thoughts? Comments?