Secure By Design for modern software, APIs, and AI applications.
Aptori helps organizations operationalize Secure By Design across the software lifecycle with secure code review, API security testing, semantic runtime validation, continuous vulnerability management, AI remediation, SBOM visibility, and compliance-ready evidence.
What is Secure By Design?
Secure By Design is a software security approach where security controls, testing, validation, remediation, and evidence are built into applications from architecture through production. Instead of treating security as a late-stage review or compliance checkpoint, Secure By Design makes secure behavior a continuous engineering and operational requirement across code, APIs, dependencies, infrastructure, AI systems, and runtime workflows.
Secure By Design requires continuous proof, not just secure development policies.
Modern software changes continuously. APIs expose business logic. AI systems introduce new input, output, and tool-use risks. Regulations increasingly expect secure development, vulnerability handling, remediation evidence, and operational assurance.
Security must be built in
Secure defaults, authorization, data protection, dependency governance, and AI guardrails need to be part of design and engineering workflows.
Risk must be validated
Teams need to know whether weaknesses are reachable and exploitable in real runtime behavior, not only whether a scanner reported a finding.
Evidence must be continuous
Security leaders, auditors, and regulators need records of testing, remediation, retesting, SBOMs, and runtime validation.
CISA made Secure by Design a global software security expectation.
CISA Secure by Design encourages software manufacturers and technology providers to reduce customer security burden, build secure defaults, eliminate vulnerability classes, and make security a core product responsibility. Aptori helps enterprises turn that principle into an operating model for software, APIs, dependencies, AI applications, and runtime systems.
Secure defaults
Validate authentication, authorization, configuration, data exposure, and API behavior before unsafe defaults reach production.
Eliminate vulnerability classes
Use semantic analysis, runtime validation, and remediation guidance to remove recurring classes of exploitable weakness.
Reduce customer burden
Generate actionable proof, fixes, and evidence instead of pushing ambiguous findings to downstream teams.
Move from scanning activity to runtime-backed assurance.
Traditional AppSec produces findings. Secure By Design requires validated behavior, risk-based remediation, and evidence that security controls continue to work as software changes.
Traditional AppSec
- Periodic scans and manual reviews
- Large vulnerability backlogs with limited context
- Limited visibility into business logic and API workflows
- Manual remediation and inconsistent retesting
- Evidence assembled late for audits
Secure By Design with Aptori
- Continuous validation across code, APIs, dependencies, and runtime
- Prioritization based on exploitability, reachability, EPSS, KEV, and business impact
- Semantic runtime validation of authorization, workflows, and API behavior
- AI-assisted remediation with fix validation
- Audit-ready evidence generated continuously
How to implement Secure By Design across the SDLC.
Aptori connects design, build, test, validate, remediate, and prove workflows into a continuous security operating model.
Design
Define secure architecture, policy, threat models, authorization, and AI usage controls.
Build
Review code, dependencies, APIs, and risky logic before release.
Validate
Test runtime behavior, workflows, identities, object access, and exploitability.
Remediate
Prioritize real risk and use AI-assisted remediation to fix faster.
Prove
Preserve testing, retesting, remediation, SBOM, and audit evidence.
Operationalize Secure By Design with Aptori.
Aptori unifies security testing, runtime validation, vulnerability intelligence, AI remediation, and evidence workflows into a single platform for modern application security.
Secure Code Review
Analyze control flow, data flow, risky code paths, authorization logic, and remediation quality. Explore Secure Code Review.
API Security Testing
Validate authentication, authorization, object ownership, business logic, and workflow abuse. Explore API Security Testing.
Semantic Runtime Validation
Prove whether weaknesses are exploitable in real application and API behavior. Explore Semantic Runtime Validation.
Continuous Vulnerability Management
Correlate findings across tools, enrich vulnerabilities with EPSS, KEV, reachability, and business context, and prioritize remediation. Explore Continuous Vulnerability Management.
SCA and SBOM Visibility
Track open source exposure, software supply chain risk, reachability, vulnerable packages, and remediation status. Explore Software Composition Analysis.
AI Security Engineer
Use AI agents to triage findings, guide fixes, validate remediation, and generate evidence. Explore AI Security Engineer.
Go deeper on Secure-by-Design Application Security.
The implementation-focused child page explains how Aptori applies Secure By Design to application security, APIs, runtime validation, and evidence workflows.
Extend Secure By Design to AI applications and agentic systems.
LLMs and AI agents introduce new risks across prompts, outputs, tool use, data access, identity context, and autonomous workflows. Secure By Design for AI requires guardrails, policy enforcement, runtime monitoring, adversarial testing, and evidence that AI systems behave safely.
Prompt and input controls
Validate user inputs, prompt injection attempts, jailbreak attempts, sensitive data exposure, and unsafe instructions.
Output validation
Inspect model responses for unsafe content, policy violations, data leakage, and insecure code generation.
Agent workflow security
Control tool access, identity-aware policy decisions, approval gates, and runtime behavior.
AI governance evidence
Capture guardrail decisions, policy enforcement, violations, remediation, and audit records.
Use Secure By Design evidence for EU CRA, NIS2, PCI DSS, UK TSA, SOC 2, and ISO 27001.
Secure By Design is increasingly connected to regulatory expectations around secure development, vulnerability handling, remediation, SBOMs, operational assurance, and audit evidence.
Explore the Secure By Design content cluster.
Use these supporting pages to connect Secure By Design strategy to application security, compliance, runtime validation, API security, vulnerability management, and evidence workflows.
Secure-by-Design Application Security
Implementation-focused page for application security, APIs, runtime validation, and audit evidence.
Application Security Compliance
The compliance pillar for PCI DSS, NIS2, EU CRA, UK TSA, SOC 2, and ISO 27001.
Semantic Runtime Validation
Prove exploitability in runtime behavior across applications and APIs.
Continuous Vulnerability Management
Aggregate signals, enrich vulnerabilities, prioritize risk, and validate remediation.
API Security Testing
Validate authorization, object access, business logic, and workflow integrity.
Secure Code Review
Use semantic code analysis to validate risky flows and guide secure fixes.
Application Security Audit Evidence
Generate records for testing, remediation, retesting, governance, and audit workflows.
AI Security Engineer
Use AI agents to triage, remediate, validate, and prove security outcomes.
Secure By Design questions.
What is Secure By Design?
Secure By Design is a software security approach where security controls, testing, validation, remediation, and evidence are built into applications from architecture through production.
What are Secure By Design principles?
Secure By Design principles include secure defaults, reduced attack surface, strong identity and authorization controls, vulnerability class reduction, continuous validation, remediation, and evidence generation.
How does Aptori operationalize Secure By Design?
Aptori operationalizes Secure By Design through secure code review, API security testing, semantic runtime validation, continuous vulnerability management, SBOM visibility, AI remediation, and compliance-ready evidence.
How is Secure By Design different from shift left?
Shift left moves security earlier. Secure By Design goes further by making security a continuous design, development, runtime validation, remediation, and evidence discipline.
Why does Secure By Design matter for APIs?
APIs expose authorization, object access, workflow, and business logic risks that cannot be fully validated through static analysis alone. Secure By Design requires testing API behavior continuously.
How does Secure By Design support compliance?
Secure By Design supports compliance by producing evidence for secure development, vulnerability management, remediation, retesting, SBOM visibility, runtime validation, and governance workflows.
Make Secure By Design measurable across your SDLC.
See how Aptori validates secure software behavior, proves real exploitability, accelerates remediation, and generates compliance-ready evidence across applications, APIs, dependencies, and AI systems.
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