Standards  >   Security Standards  >   Encryption Standards  >  

Advanced Encryption Standard

RSS Feed    Add to Google    Add to My Yahoo!
ALSO CALLED: Block Cipher, Symmetric Block Cipher, FIPS PUB 197, AES, Rijndael
DEFINITION: A block cipher is a method of encrypting text (to produce ciphertext) in which a cryptographic key and algorithm are applied to a block of data (for example, 64 contiguous bits) at once as a group rather than to one bit at a time. The main alternative method, used much less frequently, is called the stream cipher. So that identical blocks of text do not get encrypted the same way in a message (which  … 
Definition continues below.
Advanced Encryption StandardWhite Papers (View All Report Types)
1 Match
Advanced Encryption Standard New Instructions
sponsored by Dell, Inc. and Intel®
WHITE PAPER: Intel conducted tests on Web servers serving encypted data to quantify the benefits of AES-NI and found that AES-NI reduced computational overhead of encyrption by 50 percent. Continue reading this paper to learn more about the tests and results.
Posted: 10 May 2010 | Published: 04 May 2010

Dell, Inc. and Intel®
1 Match
 
ADVANCED ENCRYPTION STANDARD DEFINITION (continued): … A block cipher is a method of encrypting text (to produce ciphertext) in which a cryptographic key and algorithm are applied to a block of data (for example, 64 contiguous bits) at once as a group rather than to one bit at a time. The main alternative method, used much less frequently, is called the stream cipher. So that identical blocks of text do not get encrypted the same way in a message (which might make it easier to decipher the ciphertext), it is common to apply the ciphertext from the previous encrypted block to the next block in a sequence. So that identical messages encrypted on the same day do not produce identical ciphertext, an initialization vector derived from a random number generator is combined with the text in the first block and the key. This ensures that all subsequent blocks result in ciphertext that doesn't match that of the first encrypting.
Advanced Encryption Standard definition sponsored by SearchSecurity.com, powered by WhatIs.com an online computer dictionary

About TechTarget:

TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines

All Rights Reserved, Copyright 2000 - 2014, TechTarget | Read our Privacy Statement