Data Encryption Standard
Data Encryption Standard (DES) A very widely used cipher developed by IBM and standardized by the US National Bureau of Standards in 1977. It is a
Feistel cipher employing a 64-bit data block and a 56-bit key. The shortness of the key has given rise to much controversy concerning its security.
DES can be used simply as a
block cipher, in which case its “mode of operation” is called
Electronic Codebook (ECB). The three other NBS-recommended modes of operation are
Cipher Block Chaining (CBC),
Cipher Feedback (CFB), and
Output Feedback (OFB). These increase the security of the system by using DES as a building block in a
stream cipher, and differ regarding recovery from possible errors of transmission.
The US National Security Agency announced in 1986 that it would no longer certify the algorithm, so it lapsed as an official standard. It should now properly be called the
Data Encryption Algorithm (DEA), although DES remains its most usual name, and it continues to be used throughout the world despite being regarded as insecure for many purposes since brute-force exhaustive key searches have become feasible in some contexts.
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Encryption: we know we need it--so now what? Encrypting backed up data stored to tape or other mobile media.(Advantages and disadvantages of data encryption)
Newspaper article from: Computer Technology Review; 1/1/2006; ; 700+ words
; ...about encrypting data is not how to encrypt...which renders your encryption plan impractical...encryption for stored data can be implemented...example, by a network encryption appliance. * While...appliance's use of data center space, which...possible risk. Encryption through ...
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Encryption--three different ways.(DATABASE AND NETWORK INTELLIGENCE)
Magazine article from: Database and Network Journal; 8/1/2007; ; 700+ words
; ...that accomplish the actual encryption and decryption functions...solutions. Network attached encryption devices accomplish the actual encryption and decryption processes...attached cryptology device. The data must be protected during...
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Multimedia encryption with joint randomized entropy coding and rotation in partitioned bitstream.(Research Article)
Magazine article from: EURASIP Journal on Information Security; 1/1/2007; ; 700+ words
; ...the problem of efficient multimedia data encryption. A novel methodology is proposed to achieve encryption by controlling certain operations in...process using a secret key. The new encryption approach consists of two cascaded modules...
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 "Wisconsin State Journal (Madison, WI)")
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ENCRYPTION CONJURES UP IMAGES OF SPIES, SECRET GOVERNMENT AGENCIES BUT IT'S KEY TO DATA PRIVACY.(CAPITAL REGION BUSINESS JOURNAL)
Newspaper article from: Wisconsin State Journal (Madison, WI); 7/1/2008; 700+ words
; ...could be intercepted. For disk encryption, this may not be an issue...when encrypting transmitted data. * Asymmetric encryption , on the other hand, uses...Often symmetric and asymmetric encryption algorithms are used in combination...
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ENCRYPTION LEGISLATION:PATRICK LEAHY
Transcript from: Congressional Testimony; 3/17/1998; 700+ words
; ...For the same reason that encryption is a powerful privacy enhancing...communications and stored data, and, absent industry capitulation...ante. Recognizing that the encryption genie is out of the bottle...restrictions and domestic controls on encryption. In response to written questions...
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Why Encryption Didn't Save TJX; News Analysis: The largest data theft ever is a case in point that encryption is not a security cure-all.
Magazine article from: eWeek; 3/30/2007; ; 700+ words
; ...Despite our masking and encryption practices on our Framingham...to steal payment card data from our Framingham...card issuer's without encryption. Further, we believe...receiver of encrypted data both have the same key...more. Shared-key encryption is inherently risky...
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ENCRYPTION SECURITY:ALAN B. DAVIDSON
Transcript from: Congressional Testimony; 5/18/1999; 700+ words
; ...this Subcommittee's last encryption hearing in May 1997, 56...incremental chan2es to a U.S. encryption policy that jeopardizes privacy...backdoor access to encrypted data would impose significant new...use of strong, unescrowed encryption. Current U.S. policy dangerously...
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ENCRYPTION BILL:RONALD D. LEE
Transcript from: Congressional Testimony; 3/4/1999; 700+ words
; ...spread of strong, recoverable encryption. Law enforcement's responsibilities...confidentiality of business data through enforcement of the...Our support for robust encryption is a natural outgrowth of...and use of non-recoverable encryption by criminal elements would...
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Why Encryption Didn't Save TJX; Updated: News Analysis: The largest data theft ever is a case in point that encryption is not a security cure-all.
Magazine article from: eWeek; 5/8/2007; ; 700+ words
; ...Despite our masking and encryption practices on our Framingham...to steal payment card data from our Framingham...card issuer's without encryption. Further, we believe...curious if TJX was using data masking as articles...different methods of encryption key methods: shared...
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ENCRYPTION: more than just complex algorithms.
Magazine article from: EDN; 3/18/1999; ; 700+ words
; ...OF THE INFORMATION AVAILABLE ON ENCRYPTION FOCUSES ON THE MATH BEHIND TRANSFORMING DATA OR CREATING KEYS. ENCRYPTION, HOWEVER, IS ONLY ONE PART OF...standards exist, including the Data Encryption Standard (DES) for financial transactions...
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Encryption
Encyclopedia entry from: Gale Encyclopedia of E-Commerce
...those who would seek to break encryption codes to steal, tamper with...illicitly access sensitive data. As a result, the development of ever more impenetrable encryption methods amounts to an arms...aiming to compromise it. Encryption has a long and contentious...
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Data Encryption
Encyclopedia entry from: Encyclopedia of Small Business
Data Encryption Data encryption refers to the process of transforming electronic information...Internet and heavily used by large companies. The best-known data encryption program is called RSA. It was developed in the late 1970s by...
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Data Encryption Standard (DES)
Encyclopedia entry from: Gale Encyclopedia of E-Commerce
DATA ENCRYPTION STANDARD (DES) Highly sensitive digital...of Standards (NBS) adopted the Data Encryption Standard (DES) to protect sensitive...information from unauthorized access. Encryption is the intentional scrambling or masking...
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Advanced Encryption Standard (AES)
Encyclopedia entry from: Gale Encyclopedia of E-Commerce
ADVANCED ENCRYPTION STANDARD (AES) The Advanced Encryption Standard (AES) is the U.S. government-sponsored, data-coding, algorithmic system designed...The predecessor to AES, the Data Encryption Standard (DES), was adopted in...
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data encryption
Book article from: The Columbia Encyclopedia, Sixth Edition
data encryption the process of scrambling...recipient. Historically, data encryption has been used primarily...facsimile (fax), and data communications over ordinary...create a standard for data encryption that balanced the needs...
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