Cryptography Interview Questions
Questions Answers Views Company eMail

What is a digital certificate?

Cisco,

1 2726

What is a digital signature?

Cisco,

1 3099

What is the keystore?

Cisco,

1 2541

What is a message digest?

2 2398

What is a one-time-pad?

911

Are one-time pads really unbreakable?

739

What are good sources of randomness?

748

How to encrypt swap?

818

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

920

How do I change the password / the cipher?

624

How to make backups?

1341

What are IP Tunnels?

936

what is CBC?

926

what is ECB?

1020

Is ECB cipher mode faster than CBC ?

940



Un-Answered Questions { Cryptography }

Can symmetric block ciphers be used for message authentication?

732


What are the most important attacks on MACs ?

668


what is CBC?

926


How to change the location of the Kryptel (Silver Key) program group?

663


What are "Exotic" protocols?

331


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.

1820


How to remove the Kryptel (Silver Key) icon from the desktop?

617


What are elliptic curve cryptosystems ?

596


Expalin LaGrange Interpolation Polynomial Scheme?

311


What is a hard problem ?

715


What is Steganography?

172


Exactly how strong are these ciphers?

1069


What are some other DES variants ?

693


What would it take to break RSA ?

776


Which cryptographic mechanism provides non-repudiation?

699