Taking Exam on LAN
Concise Operating Page
Easy for users to operate and make a exam with comprehensive analysis.
Data Security
100% data ownership. Used on the LAN. Automatic data backup.
One-time payment
14-day money back guarantee
Basic online exam features
300 concurrent exam takers
Only one admin account
Add logo to online exam UI
Lifetime license & free new update
5×8 email support/live chat
One-time payment
14-day money back guarantee
Everything in Standard version
1000 concurrent exam takers
Unlimited sub-admin accounts
Add logo to online exam, dashboard, add custom domain
Add video/audio to exam questions
Automatic grading and manual grading
Online webcam proctoring system
API & SSO
Lifetime license & free new update
7×16 email support/live chat, remote assistance
One-time payment
14-day money back guarantee
Everything in Professional version
Create unlimited training courses
Track learning records of students
Export learning records, exam taken records, and exam reports
Insert assessments to training courses
Course reviews, FAQ
Point ranking system for learning & exams
API & SSO
Lifetime license & free new update
7×16 email support/live chat, remote assistance
Features of Our LAN Exam Maker
Customize Your Own Brand
Upload your brand Logo, personalized the background of the exams, and connect your own exam system with your company domain, you are able to create customized exam system with your brand experience easily.
Secure and High Concurrency
The system supports the exam with high concurrency, and can carry out exams simultaneously to 100,000 exam takers.
Exam organizers can build testing with random questions, simultaneously records videos, and take photos of all the candidates during the exam.
Comprehensive Statistical Analysis
You can group all the candidates with different score rankings. What is more, it is easy to make a comparative analysis about the scores of the students in many departments.
Stable, Safe and Efficient
APACHE + MYSQL + GO, the system is simple to extend with high security and B/S mode, and can be used not only on the online network, but also on the LAN.
This post explores what makes a key generator secure, why randomness matters, and how to build or use an effective "All Keys Generator." If an attacker can guess or reproduce your encryption key, your encryption is worthless. That's why cryptographic randomness is different from typical "random" you get from Math.random() in programming languages.
🚫 Use a secrets manager (Vault, AWS Secrets Manager, or encrypted keystore).
// JWT secret (base64) const jwtSecret = crypto.randomBytes(32).toString('base64'); import java.security.SecureRandom; import java.util.Base64; SecureRandom sr = new SecureRandom(); byte[] aesKey = new byte[32]; // 256 bits sr.nextBytes(aesKey); All Keys Generator Random Security-encryption-key
You can publish this on a tech blog, dev community site, or internal knowledge base. Introduction In the world of cybersecurity, the strength of your encryption is only as strong as the key you use. An "All Keys Generator" is not just a tool—it's a concept representing the ability to generate truly random, unpredictable, and secure encryption keys for any algorithm: AES, RSA, ChaCha20, JWT secrets, API keys, and more.
🚫 Separate encryption keys from API keys from signing keys. This post explores what makes a key generator
String hexKey = bytesToHex(aesKey); String b64Key = Base64.getEncoder().encodeToString(aesKey); 🚫 Using low‑entropy input as a key hash("mypassword") – attackers will brute‑force it. Use a proper KDF like Argon2.
: No amount of fancy key generation will protect you if you leak the key afterwards. Generate securely → store encrypted → rotate regularly. Have you ever had a key generation failure or security incident? Share your experience in the comments. // JWT secret (base64) const jwtSecret = crypto
✔ Use a CSPRNG ✔ Always get entropy from the OS ✔ Never roll your own random generator ✔ Store keys securely, separate from code