Computer & Information Sciences
Cyber Security Challenges
Real cyber-security challenges on Ewance — assess risk, harden systems, and respond to threats the way a working security professional does. Solve them to build a portfolio of verified, recruiter-checkable proof you can do the work — not just describe it.
Recommended challenges
- CodeIntermediateNew
Apply Differential Privacy to a HealthTech Analytics Dashboard
Wrap the existing analytics layer with OpenDP (or Google's differential-privacy library). Implement epsilon-delta accounting: per-query Laplace noise for counts and sums, Gaussi…
- Differential Privacy
- Privacy Budget
- Python Or Javascript
Privacy-Enhancing Technologies - ResearchBeginnerNew
Cybercrime-Economy Brief for an Anonymized Insurance Underwriter
Synthesize open-source intelligence from CISA advisories, public vendor reports (CrowdStrike, Mandiant, Recorded Future), darknet-market trackers, and the Ransomware Live tracke…
- Threat Intelligence
- Cybercrime Economy
- Ransomware
Cyber-Physical and Cybercrime Topics - CodeIntermediateNew
Static Analysis SAST Rollout on a Fintech Codebase
Run baseline scans with Semgrep + SonarQube + Snyk Code across all 18 services. Triage the initial findings (likely 800-1,500 raw alerts) into true-positive / false-positive / i…
- Sast
- Semgrep
- Sonarqube
Software Security - CodeIntermediateNew
Fuzz a Memory-Unsafe Image-Parsing Library
Identify 3 critical parser entry points (DICOM dataset parser, JPEG 2000 decoder, TIFF directory parser) and write a libFuzzer harness + an AFL++ harness for each. Build with AS…
- Fuzzing
- Memory Safety
- Address Sanitizer
Software Security Practice your coursework on real scenarios.
Every challenge is shaped from real-world context — not generic exercises. The work mirrors what your degree prepares you for.
Why Ewance
- AnalysisIntermediateNew
Anonymous Communications Threat-Model for a Whistleblower Platform
Document the current stack's threat model using the LINDDUN framework (linkability, identifiability, non-repudiation, detectability, disclosure of information, unawareness, non-…
- Anonymous Communication
- Threat Modeling
- Tor
Privacy-Enhancing Technologies - CodeBeginnerNew
Implement Authentication and Access Control for a Civic Portal
Receive the current Next.js + Express prototype, the data model (residents, requests, documents, audit log), and the 4 staff roles (resident, clerk, supervisor, auditor) with th…
- Authentication
- Authorization
- Rbac
Introduction to Computer Security - CodeIntermediateNew
Implement Federated Learning for a Government Statistics Office
Use Flower as the FL framework. Simulate 8 municipalities each with a partition of a synthetic wage dataset (provided, 1M rows, EU-Labour-Force-Survey schema). Train a gradient-…
- Federated Learning
- Differential Privacy
- Python Or Javascript
Privacy-Enhancing Technologies - CodeSeniorNew
Reverse-Engineer and Patch an N-Day Vulnerability in a Vendor Binary
Receive the vulnerable binary (Linux ELF, x86-64), the public CVE-2025-XXXX advisory + PoC, and the bank's deployment context (RHEL 9, the binary runs as a non-root service). Lo…
- Reverse Engineering
- Binary Exploitation
- Ghidra
Computer Systems Security - Browse challenges
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Ship product that solves real user problems. Combine user research, prototyping, and stakeholder alignment to turn ambiguous briefs into measurable wins — the role at the centre of modern software teams.
- AnalysisBeginnerNew
Audit Encryption Choices for an E-Commerce Checkout Stack
Receive the architecture diagram (Next.js on Vercel, PostgreSQL on a managed service, Stripe-equivalent processor, Redis sessions), the TLS configurations for each public endpoi…
- Cryptography
- Tls
- Pci Dss
Introduction to Computer Security - DesignIntermediateNew
Author an Incident Response Playbook for a Fintech Startup
Author a 4-phase playbook (Prepare, Detect & Analyze, Contain/Eradicate/Recover, Post-Incident) covering 6 incident classes: data breach, ransomware, account takeover, payment-f…
- Incident Response
- NIST Sp 800 61
- Security Governance
Information Security Management and Governance - 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 - CodeIntermediateNew
Secure the Software Supply Chain of an Open-Source SDK
Audit the current state: dependency tree, publish process, GitHub Actions workflows, signing posture. Generate an SBOM (CycloneDX format) using Syft. Run OpenSSF Scorecard and t…
- Supply Chain Security
- Slsa
- Sbom
Software Security Build a verifiable portfolio.
Submissions become evidence. Reviewers with shipping experience score against a rubric; the result becomes a credential anyone can verify.
Why Ewance
- 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 - AnalysisIntermediateNew
Privacy-by-Design Review for a Smart-City Data Platform
Map the new module's end-to-end data flow (sensors -> ingestion -> analytics -> dashboards -> exports). Run a Privacy Impact Assessment against OECD privacy principles + per-ten…
- Privacy By Design
- Privacy Regulation
- Compliance
Information Security Management and Governance - AnalysisIntermediateNew
Build a Risk Register for a Cross-Border Healthcare Provider
Run 8 structured interviews (CISO, IT director, clinical-systems lead, DPO, 4 clinic managers) to surface the top risk candidates. Map each risk against NIST SP 800-30 (threat s…
- Risk Management
- NIST Sp 800 30
- Security Governance
Information Security Management and Governance - StrategySeniorNew
TLS and PKI Migration to Post-Quantum for a Cross-Border Bank
Receive an anonymized TLS inventory (endpoint, current cipher suite, TLS version, certificate issuer, last rotation, business criticality) and the bank's PKI hierarchy. Score en…
- Tls
- Pki
- Post Quantum Cryptography
Network Security - AnalysisIntermediateNew
GDPR + AI Act Compliance Assessment for an HR-Tech Vendor
Audit the candidate-screening product against: GDPR Articles 5, 6, 13, 14, 22, 25, 32, 35; AI Act high-risk-system obligations (Annex III - employment); plus the customer's spec…
- Compliance
- Privacy Regulation
- GDPR
Information Security Management and Governance - AnalysisIntermediateNew
Penetration-Test the TLS Configuration of an Edge Fleet
Receive read-only access to a 50-node representative sample (anonymized). Scan with testssl.sh + Qualys SSL Labs (where reachable) + a custom Go tool you write to test specific …
- Tls
- Applied Cryptography
- Penetration Testing
Applied Cryptography - AnalysisSeniorNew
Forensic Reconstruction of an Anonymized Energy-Grid Incident
Triage the artifacts using a timeline-first methodology. Build a unified timeline across syslog, historian, firewall, and disk-image artifacts (Plaso super-timeline). Identify c…
- Digital Forensics
- Incident Response
- Ics Security
Cyber-Physical and Cybercrime Topics - AnalysisBeginnerNew
Wireless Security Audit and Hardening for a Telco's Public Wi-Fi
Receive a sampled audit set: AP configurations for 80 sites (vendor mix, current encryption, EAP — Extensible Authentication Protocol — method, captive-portal config). Run analy…
- Wireless Security
- Wpa3
- Eap
Network Security - AnalysisIntermediateNew
Network Privacy Posture Review of a Fintech's Internal Service Mesh
Receive an anonymized service inventory (110 services with owner, data classification, traffic volume buckets) and a sample of east-west traffic logs (5 high-volume service pair…
- Network Privacy
- Mtls
- Service Mesh
Network Security - DesignBeginnerNew
Vendor-Security Review Program for a Series-C SaaS
Design a 3-tier TPRM framework (critical / important / low-risk) with explicit classification criteria (data type, integration depth, downtime impact, regulatory scope). For eac…
- Third Party Risk
- Security Governance
- Compliance
Information Security Management and Governance - ResearchSeniorNew
Audit a Custom Cryptographic Protocol
Read the 22-page protocol spec, the Go reference implementation (around 4,000 lines), and the test vectors. Run a structured review covering: primitive choices (which cipher, MA…
- Applied Cryptography
- Cryptographic Audit
- Protocol Analysis
Applied Cryptography - CodeSeniorNew
Build a Secure Multi-Party Computation Demo for Cross-Bank Fraud Detection
Pick MP-SPDZ as the MPC framework. Build a 4-party demo computing two protocols: (1) private set intersection of suspicious-account IDs across banks, (2) joint aggregate (count …
- Secure Computation
- Mpc
- Cryptography
Privacy-Enhancing Technologies
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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