Function of key secrecy and algorithm secrecy in security, Computer Network Security

What is the function of key secrecy and algorithm secrecy in security? 

Algorithm Secrecy is explained as follows:

‘Algorithm secrecy’ is a method of keeping an algorithm secret from unauthorized users. A concept which is based on the secrecy of the algorithm is frequently referred to as secrecy through obscurity, which gives us security by hiding the data in the obscure location. But, the system using this concept might suffer from number of security vulnerabilities. The disadvantage of using algorithm secrecy is that it is not easy to maintain the secrecy of the system because when algorithms  are  known  by the  unauthorized  users,  an  totally  new  secret  algorithm  is  to  be developed for performing the encryption and decryption of cipher text. Additionally to algorithms, it would be essential to change keys as well.

Key Secrecy is explained below:

In cryptography, a key refers to a small piece of information with which the functional result of the cryptographic algorithm is recognized. When a key is not used, the algorithm will not create any result. In encryption, a key is used to transform the plaintext into cipher text or vice versa in case of decryption. Several cryptographic algorithms such as message authentication codes and digital signature schemes use key for purpose of security. “Key” security can be simply managed when compared to “encryption algorithm” protection. Though, the length of the key should be as long as possible so as to give us a strong security.

When the key is known by the unauthorized users, it can be simply changed. Therefore, the security of an encryption system mainly depends on a certain key, which is being kept secret.

`Practically, it is hard to provide key secrecy in cryptography. For example, when an attacker attains the key, the original message can be retrieved from encrypted data.

Encryption algorithms which make use a similar key for performing encryption and decryption both is referred to as symmetric key algorithms.  The other public key cryptographic algorithms which make use of two different keys for encryption and decryption are called as asymmetric key algorithms. In asymmetric key algorithms, one key is made public, and the other is kept private. Thus, it is extremely complicated for the unauthorized users to determine the private key even if the corresponding public key is known. A user of public key technology keeps the private key secret and discloses public key so that anybody can send them an encrypted message.

Posted Date: 7/20/2012 6:04:57 AM | Location : United States

Related Discussions:- Function of key secrecy and algorithm secrecy in security, Assignment Help, Ask Question on Function of key secrecy and algorithm secrecy in security, Get Answer, Expert's Help, Function of key secrecy and algorithm secrecy in security Discussions

Write discussion on Function of key secrecy and algorithm secrecy in security
Your posts are moderated
Related Questions
(a) Explain the two possible configuration for 3DES. (b) What is the main disadvantage of 3DES? (c) Why are most modern symmetric algorithm block ciphers? (d) Describe

Q. Analysis of the Problem of cyber attack? According to the case, The EZ Company is a prominent organization specialized in information integration and visualization technolog

a) Define the term "Enterprise Network". b) Briefly discuss the similarity and differences between a switch and a router. c) A company XYZ has been renting the 1 st Floor of

QUESTION (In this question, you will need to use the ISO 27001:2005 and ISO 27002:2005 standards) For each of the situations below, comment on the following: 1. Mention

Question: (a) Data on four variables are stored in a file called file1.dat. The first line of the file is the variable names f, x, y and z. Give the R commands to (i) read t

BUSINESS NEEDS Information security performs four main functions for an organization. 1. Protects the ability of organization to function. 2. Enables safe operation of applicat

CONCEPT OF PACKET : Network systems splits data in small junks or blocks known as packets, which they send individually. Why we required packets rather than bits? The answer to

Selecting a Risk Control Strategy Risk controls involve selecting one of the 4 risk control strategies for every vulnerability. The flowchart is shown in the figure given below

Belady's Anomaly Also known FIFO anomaly. Generally, on raising the number of frames given to a process' virtual storage, the program execution is faster, because lesser page

ADDRESS RESOLUTION WITH MESSAGE EXCHANGE An alternative to local calculation is a distributed function. A computer that requires to find an address transmits a message across