Cryptography Interview Questions
Questions Answers Views Company eMail

What is a digital certificate?

Cisco,

1 4205

What is a digital signature?

Cisco,

1 4858

What is the keystore?

Cisco,

1 3471




What is a message digest?

2 3327

What is a one-time-pad?

1241

Are one-time pads really unbreakable?

957

What are good sources of randomness?

1027

How to encrypt swap?

1066

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

1151

How do I change the password / the cipher?

886

How to make backups?

1580

What are IP Tunnels?

1182

what is CBC?

1175

what is ECB?

1305

Is ECB cipher mode faster than CBC ?

1315







Un-Answered Questions { Cryptography }

What are some of the more popular techniques in cryptography ?

1836


What is privacy ?

1131


What is IEEE P1363 ?

953


What are the most important attacks on symmetric block ciphers?

2149


What is an encryption "key" and what is the importance of key length?

997






How much extra message length is caused by using RSA?

2


What are digital certificates ?

1126


What are some of the basic types of cryptanalytic attack ?

814


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.

2362


How does the Clipper chip work?

3


Should one test for weak keys in DES ?

1208


What are the ITU-T (CCITT) Standards ?

974


How can signatures remain valid beyond the expiration dates of their keys, or, How do you verify a 20-year-old signature?

2


What are proactive security techniques ?

1518


What is a hard problem ?

1010