Cryptography Interview Questions
Questions Answers Views Company eMail

What is a digital certificate?

Cisco,

1 2938

What is a digital signature?

Cisco,

1 3360

What is the keystore?

Cisco,

1 2699




What is a message digest?

2 2566

What is a one-time-pad?

966

Are one-time pads really unbreakable?

774

What are good sources of randomness?

796

How to encrypt swap?

857

shall we use a journalling filesystem on top of /dev/loop?

954

How do I change the password / the cipher?

660

How to make backups?

1385

What are IP Tunnels?

974

what is CBC?

969

what is ECB?

1057

Is ECB cipher mode faster than CBC ?

973







Un-Answered Questions { Cryptography }

How do CAs sign certificates?

901


What is Compressed archives?

371


What are strong primes and are they necessary for RSA ?

880


A company wants to transmit data over the telephone, but it is concerned that its phones may be tapped. All of its data is transmitted as four-digit integers. It has asked you to write a program that will encrypt its data so that the data may be transmitted more securely. Your script should read a four digit integer entered by the user in a prompt dialog and encrypt it as follows: Replace each digit by (the sum of that digit plus 7) modulus 10. Then swap the first digit with the third, and swap the second digit with the fourth. Then output XHTML text that displays the encrypted integer.

1923


What improvements are likely in factoring capability ?

617


What is secret splitting?

340


What is Steganography?

217


Blowfish uses the longest key. Does this mean it is the strongest cipher?

1060


What are the most important attacks on stream ciphers ?

1260


What is key management ?

908


Why do you keep the name of the used cipher in the open?

1192


What is RC2 ?

1295


What are some other DES variants ?

737


What is PSS/PSS-R ?

1264


What are Message Authentication Codes (MACs) ?

824