Computer Science
Security & Cyber Defense Challenges
Security & Cyber Defense challenges put you inside the work of protecting systems from real attack. You'll build skills around the CIA triad, authentication, identity & access management and network security, and learn to work the OWASP Top 10 and run vulnerability scanning the way defenders do.
From there you'll tackle the harder edges — threat modeling, the MITRE ATT&CK framework, SIEM operations and incident response — moving into cyber risk management, Zero Trust architecture and red team operations. Each challenge you solve earns a verified credential you can share with recruiters.
- DesignIntermediateNew
Intrusion Detection at the Edge for a Tier-1 Auto Supplier's OT Network
Receive an anonymized network diagram for 1 plant, sample pcap (packet capture) traffic of Modbus + OPC UA + PROFINET flows, and a list of 10 known OT attack scenarios from MITR…
- Intrusion Detection
- Ot Security
- Zeek
Network Security - ResearchIntermediateNew
Audit an Agentic Workflow for Safety Failures
Read the system's existing capability spec + tool-allow-list. Design 50+ adversarial inputs across categories: prompt-injection, tool-confusion, scope-escape (agent does somethi…
- Ai Red Teaming
- Agent Safety
- Prompt Injection
Multi-Agent Systems - DesignSeniorNew
Design a Confidential-Computing Architecture for a Genomics Workflow
Receive the workflow description (per-hospital genome BAM files uploaded to S3, processed by a variant-calling pipeline, results returned per-hospital), the partner-hospital leg…
- Confidential Computing
- Remote Attestation
- Secure Architectures
Computer Systems Security - DesignIntermediateNew
Security Policy Overhaul for a 40-Person SaaS Scale-Up
You are the new IT security manager. Review current policies (provided in a brief), identify gaps against SOC 2 trust service criteria, and produce a new set of 5 core policies …
- Security Policy Development
- Soc 2 Compliance
- Vendor Risk Management
IT Governance and Security Develop in-demand professional skills.
Each challenge names the skills it strengthens. Over time, your profile fills with the competences a hiring manager would actually look for.
Why Ewance
- DesignIntermediateNew
Detection Engineering for Cloud DDoS Against a Public-Sector Portal
Receive sanitized logs from the 2 prior incidents (CloudFront, ALB, WAF) and the current AWS architecture. Design: 6 Sigma detection rules (mix L7 floods, slow-POST, low-rate di…
- Ddos Defense
- Detection Engineering
- Waf
Network Security - DesignIntermediateNew
Spec Trust-and-Safety Eval Harness for an LLM-Powered Customer-Support Bot
You will spec a 6-page evaluation harness covering: (1) jailbreak test set (about 200 prompts across 6 attack families), (2) PII-leakage probes (about 100 synthetic-customer pro…
- LLM Evaluation
- Red Team Operations
- Pii Detection
Trustworthy AI, Robustness, and Safety - DesignIntermediateNew
Design a Secure Wi-Fi Onboarding Flow for IoT Devices
Design a BLE-based onboarding protocol: device advertises a service UUID on power-on, the companion app discovers, performs an ECDH key exchange, then encrypts and sends Wi-Fi S…
- Link Layer Protocols
- Ble
- Secure Onboarding
Computer Networks - AnalysisBeginnerNew
Threat-Model a Patient-Intake Web App for a Telemedicine Startup
Receive the architecture diagram (Next.js front-end, Node.js API, PostgreSQL, S3 for ID-photo uploads, Clerk for auth), the data-flow description for patient intake, and the SOC…
- Threat Modeling
- STRIDE
- Risk Assessment
Introduction to Computer Security - Browse challenges
Explore role
Strategy Analyst
Frame the business question, model the options, build the recommendation. From market sizing to competitive analysis, this role is where strategy consulting meets in-house decision-making.
- ResearchSeniorNew
Multi-Tenant Vector Isolation for a B2B Knowledge Assistant
Build a small proof-of-concept in your chosen vector store (Pinecone or Qdrant — pick one and justify) that supports 10 simulated tenants with 1,000 vectors each. Implement the …
- Multi Tenant Isolation
- Vector Databases
- Threat Modeling
Vector Databases and Embeddings - ResearchIntermediateNew
Red-Team a Customer-Service Chatbot for Jailbreak Resistance
Use a published taxonomy of jailbreak categories (prompt injection, persona override, encoded payloads, multi-turn escalation, refusal bypass, tool-misuse). For each category, d…
- Red Team Operations
- Jailbreak Analysis
- LLM Evaluation
AI Safety and Alignment - CodeBeginnerNew
Build a Secure-Coding Linter Ruleset for a Backend Team
Receive the last 12 security-review findings, 3 representative repos (Node.js + TypeScript), and access to a CI pipeline (GitHub Actions). Build a custom Semgrep ruleset (or ESL…
- Secure Coding
- Static Analysis
- Semgrep
Introduction to Computer Security - DesignSeniorNew
Design an End-to-End Encrypted Messaging Protocol
Read the Signal protocol specifications (X3DH, Double Ratchet) and the team's current architecture (server-stored unencrypted messages). Design an E2EE protocol covering: identi…
- Applied Cryptography
- Protocol Design
- Systems Language Proficiency (Go, Rust, C++)
Applied Cryptography Get recognized by recruiters and employers.
Credentials are blockchain-anchored via LearnCoin — tamper-evident, portable, link-shareable on LinkedIn and beyond.
Why Ewance
How it works
From brief to credential, in six steps.
Step 01
Browse challenges aligned to your studies.
Step 02
Accept the one that fits your goals.
Step 03
Work through it with AI Copilot guidance.
Step 04
Submit for structured evaluation.
Step 05
Earn a verified credential.
Step 06
Add it to LinkedIn with one click.
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