1.### What is

### What is *cryptography*, and what are its main goals?

Answer:

"Huge timesaver. Worth the money"

"It's an excellent tool"

"Fantastic catalogue of questions"

Only coding challenges

- 1.
### What is

*cryptography*, and what are its main goals?Answer: - 2.
### Explain the difference between

*symmetric*and*asymmetric cryptography*.Answer: - 3.
### What is a

*cryptographic hash function*, and what properties must it have?Answer: - 4.
### Describe the concept of

*public key infrastructure (PKI)*.Answer: - 5.
### What is a

*digital signature*, and how does it work?Answer: - 6.
### Can you explain what a

*nonce*is and how it’s used in*cryptography*?Answer: - 7.
### What does it mean for a

*cryptographic algorithm*to be “computationally secure”?Answer: - 8.
### Describe the concept of

*perfect secrecy*and name an*encryption system*that achieves it.Answer:

- 9.
### What are

*substitution*and*permutation*in the context of*encryption algorithms*?Answer: - 10.
### Explain the basic principle behind the

*AES encryption algorithm*.Answer: - 11.
### What is the

*Data Encryption Standard (DES)*, and why is it considered insecure today?Answer: - 12.
### Describe the differences between

*RSA*and*ECC (Elliptic Curve Cryptography)*.Answer: - 13.
### How does a

*stream cipher*differ from a*block cipher*?Answer: - 14.
### Can you describe the

*Feistel cipher structure*?Answer: - 15.
### What are the key differences between

*DES*and*3DES*?Answer: - 16.
### Explain the main security features of the

*RSA algorithm*.Answer: - 17.
### What is

*quantum cryptography*, and how might it impact current*encryption methods*?Answer:

- 18.
### What is

*cryptanalysis*?Answer: - 19.
### What is a

*brute force attack*, and how can systems be protected against it?Answer: - 20.
### Describe a

*man-in-the-middle attack*and how it can be prevented.Answer: - 21.
### Explain what a

*side-channel attack*is.Answer: - 22.
### What is a

*chosen plaintext attack*?Answer: - 23.
### How does a

*frequency analysis attack*work against certain*ciphers*?Answer:

- 24.
### What is the difference between

*HMAC*and a simple*hash function*?Answer: - 25.
### Explain the concept of a

*collision*in*hash functions*and why it is significant.Answer: - 26.
### Describe the

*birthday attack*and its relevance to*hash functions*.Answer: - 27.
### How does a

*digital signature*guarantee the*integrity*and*authenticity*of a message?Answer: - 28.
### What are

*RSA signatures*, and how do they differ from*RSA encryption*?Answer: - 29.
### Explain the importance of using a

*secure hash algorithm*for*digital signatures*.Answer: - 30.
### What is a

*Merkle tree*, and how is it used in*cryptography*?Answer:

- 31.
### What is

*key distribution*, and what challenges does it present?Answer: - 32.
### Describe

*Diffie-Hellman key exchange*and its primary use.Answer: - 33.
### Explain what a

*key escrow*is and its purpose in*cryptography*.Answer: - 34.
### How do

*certificate authorities*help in securing communications over the internet?Answer: - 35.
### What is

*forward secrecy*, and what*protocols*use this property?Answer:

- 36.
### Explain the role of

*cryptography*in*user authentication*.Answer: - 37.
### What is

*multi-factor authentication*, and how is*cryptography*involved?Answer: - 38.
### Describe the

*OAuth 2.0 protocol*and its use cases in*authentication*.Answer: - 39.
### Explain the concept of

*role-based access control (RBAC)*and its cryptographic requirements.Answer:

- 40.
### How does

*HTTPS*utilize*cryptography*to secure communications over the web?Answer: - 41.
### What is a

*TLS/SSL certificate*, and how does it establish a secure session?Answer: - 42.
### Explain how

*cryptography*is used in*blockchain technology*.Answer: - 43.
### Describe the use of

*cryptographic primitives*in*password hashing*.Answer: - 44.
### How do

*secure cookies*work, and what*cryptographic measures*are involved?Answer:

- 45.
### Explain the principles behind

*homomorphic encryption*and its potential applications.Answer: - 46.
### What is

*zero-knowledge proof*, and how does it maintain privacy?Answer: - 47.
### Describe the concept of

*secure multi-party computation*.Answer: - 48.
### Explain the purpose of

*post-quantum cryptography*.Answer:

- 49.
### What is the

*NIST*, and what role does it play in*cryptography*?Answer: - 50.
### How do

*cryptographic modules*and*algorithms*get validated (e.g.,*FIPS 140-2*)?Answer: - 51.
### Explain the importance and usage of the

*Common Criteria for Information Technology Security Evaluation*.Answer: - 52.
### Describe the purpose of the

*Transport Layer Security (TLS) protocol*and its predecessor*SSL*.Answer: - 53.
### What is the

*S/MIME standard*, and what is it used for?Answer:

- 54.
### When should you use

*hardware-based cryptographic modules*such as*HSMs*in an application?Answer: - 55.
### What are the best practices for managing

*cryptographic keys*within an enterprise?Answer:

Get the inside track on what to expect in your next interview. Access a collection of high quality technical interview questions with detailed answers to help you prepare for your next coding interview.

Simple interface helps to track your learning progress. Easily navigate through the wide range of questions and focus on key topics you need for your interview success.

Save countless hours searching for information on hundreds of low-quality sites designed to drive traffic and make money from advertising.

Land a six-figure job at one of the top tech companies

Ready to nail your next interview?

Go up