Answer Posted / ramkumar
Private keys must be stored securely, since forgery and
loss of privacy could result from compromise (see Question
4.1.3.7). The measures taken to protect a private key must
be at least equal to the required security of the messages
encrypted with that key. In general, a private key should
never be stored anywhere in plaintext form. The simplest
storage mechanism is to encrypt a private key under a
password and store the result on a disk. However, passwords
are sometimes very easily guessed; when this scheme is
followed, a password should be chosen very carefully since
the security is tied directly to the password.
Storing the encrypted key on a disk that is not accessible
through a computer network, such as a floppy disk or a
local hard disk, will make some attacks more difficult. It
might be best to store the key in a computer that is not
accessible to other users or on removable media the user
can remove and take with her when she has finished using a
particular computer. Private keys may also be stored on
portable hardware, such as a smart card. Users with
extremely high security needs, such as certifying
authorities, should use tamper-resistant devices to protect
their private keys (see Question 4.1.3.13).
Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
What is private key cryptography and how we compare it with public key cryptography?
what is trapdoor and how does it works?
What is the difference between Kryptel and Silver Key?
What are the cfb and ofb modes?
How Encoding is different from Encryption?
How do certifying authorities store their private keys ?
Is there a limit on the file size or on the number of encrypted files?
What Is Encryption?
Does encryption of connection strings in web.config file possible? How?
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.
What is decryption?
What is exhaustive key search ?
What is an encryption "key" and what is the importance of key length?
Do encrypted files contain password in some form?
What is a zed encoder? How does it work?