Cryptography Trivia Questions
- ❓ 109+ questions
- 🗂️ Mathematics
- 🎚️ Easy to expert
- ✨ Free to play
Mathematics of secure communication. Play Cryptography trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play. Questions span every level, from easy warm-ups to expert-level stumpers, so there's a real challenge here however much you already know.
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Sample Cryptography Quiz Questions
A mix of easy, medium and hard — questions run from warm-up to expert, so there's a real challenge at every level. Think you know the answers? Play to find out.
When you see a padlock icon in your browser's address bar, it indicates the website is using this secure protocol to protect your data.
Difficulty: Easy- DNS
- SMTP
- HTTPS
- FTP
In 1977, three MIT researchers published this groundbreaking algorithm that enabled secure communication without ever sharing a secret key beforehand.
Difficulty: Medium- SHA
- DES
- MD5
- RSA
The algebraic group model sits between standard model proofs and random oracle proofs, assuming adversaries can only compute group elements through this type of operation.
Difficulty: Hard- Field arithmetic
- Modular exponentiation
- Polynomial evaluation
- Generic group operations
This type of secret phrase or word is required to unlock an encrypted file or log into a secure account.
Difficulty: Easy- Username
- Cache
- Password
- Cookie
This protocol establishes a shared secret over an insecure channel, allowing two parties to create encryption keys without ever directly exchanging them.
Difficulty: Medium- Digital certificate binding
- Elliptic curve signature
- RSA key encapsulation
- Diffie-Hellman key exchange
The PLONK proving system uses this polynomial commitment scheme to achieve universal and updateable trusted setups for zero-knowledge proofs.
Difficulty: Hard- Merkle commitments
- KZG commitments
- Pedersen commitments
- Hash-based commitments
Before sending private information online, your computer scrambles it using this process, making it unreadable to anyone who intercepts it.
Difficulty: Easy- Defragmentation
- Indexing
- Compression
- Encryption
When websites add random data to passwords before applying the hash function, they're using this technique to defeat precomputed attack tables.
Difficulty: Medium- Salt
- Padding
- Key stretching
- Pepper
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