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Topic: Secure Hash Algorithm

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	RFC 3174 (rfc3174) - US Secure Hash Algorithm 1 (SHA1)
		The same hash algorithm must be used by the verifier of a digital signature as was used by the creator of the digital signature.
		Security Considerations This document is intended to provide convenient open source access by the Internet community to the United States of America Federal Information Processing Standard Secure Hash Function SHA-1 [FIPS 180-1].
		No independent assertion of the security of this hash function by the authors for any particular use is intended.
	www.faqs.org /rfcs/rfc3174.html (2869 words)

	Secure Hash Algorithm
		The family of SHA (blocked algorithm of parasitic information) is a whole of relative cryptographic functions of parasitic information.
		The algorithms of SHA were designed by the agency of national safety (NSA) and published like normalizes government of the USA.
		The first member of the family, published in 1993, is called officially SHA; however, this is often called Sha-0 to avoid confusion with its successors.
	blog.bletchleypark.net /2006/03/secure_hash_algorithm.htm (194 words)

	SHA - Secure Hash Algorithm
		Secure Hash Algorithm, a message digest algorithm developed by the NSA for use in the Digital Signature standard, FIPS number 186 from NIST.
		Sha is used to refer to a person's shooting in the aggregate.
		The Secure Hash Algorithm is defined in FIPS PUB 180-1.
	www.auditmypc.com /acronym/SHA.asp (672 words)

	Securing Electronic Transactions Using SHA-1 Secure Hash Algorithm - Maxim/Dallas
		Of course, it is critical that the complex mathematical algorithm used is not reversible, since the attacker could run the operation in reverse and derive the secret.
		In fact, the choice of algorithm may be the single most important factor in judging the security of a challenge and response scheme.
		When a secure token is used in monetary applications, the data it contains (presumably the account balance) is said to be dynamic, because the critical value is read, debited, and rewritten each time the device is used.
	www.maxim-ic.com /appnotes.cfm/appnote_number/1770/ln/en (2281 words)

	Cryptographic hash function - Wikipedia, the free encyclopedia
		In cryptography, a cryptographic hash function is a hash function with certain additional security properties to make it suitable for use as a primitive in various information security applications, such as authentication and message integrity.
		If used for security, they are vulnerable to attack; for example, a CRC was used for message integrity in the WEP encryption standard, but an attack was readily discovered which exploited the linearity of the checksum specified.
		The SHA hash functions are a series of functions developed by the NSA: SHA, also known as SHA-0, SHA-1 and four flavours of a function known as SHA-2.
	en.wikipedia.org /wiki/Cryptographic_hash_function (1630 words)

	HASH
		Hash can calculate the hash value for a single file, for files in an entire directory, files in an entire path, or files on an entire logical drive, or drives.
		The hash of a file can be used as a verification of the state of a file at a certain time.
		HASH defaults to calculate the hash values of all files in the current default directory, and all sub-directories.
	www.dmares.com /maresware/html/hash.htm (5702 words)

	shs1, shs, sha1, sha - Secure Hash Standard
		The Secure Hash Standard-1 (SHS-1) is a United States Department of Commerce National Institute of Standards and Technology approved standard (FIPS Pub 180-1) for secure hashing.
		The sha1 utility implements the new Secure Hash Algorithm-1 (SHA-1) as specified by (FIPS Pub 180-1).
		The sha utility implements the old Secure Hash Algorithm (SHA) as specified by (FIPS Pub 180).
	www.isthe.com /chongo/man/shs.1.html (1286 words)

	Kryptographie FAQ: Frage 100: What is the Secure Hash Algorithm (SHA and SHA-1)? (Site not responding. Last check: 2007-10-26)
		The Secure Hash Algorithm (SHA), the algorithm specified in the Secure Hash Standard (SHS), was developed by NIST (see Question 146) and published as a federal information processing standard (FIPS PUB 180) [NIS93a].
		The algorithm is slightly slower than MD5 (see Question 99), but the larger message digest makes it more secure against brute-force collision and inversion attacks (see Question 96).
		SHA is part of the Capstone project (see Question 150).
	www.iks-jena.de /mitarb/lutz/security/cryptfaq/q100.html (158 words)

	Hash Algorithm
		HAVAL -- a one-way hashing algorithm with variable length of output, Y. Zheng, J. Pieprzyk and J. Seberry, Advances in Cryptology -- AusCrypt'92, LNCS 718, pp.
		Algorithm 9.53 Secure Hash Algorithm - revised (SHA-1), A. Menezes, P.C. van Oorschot, S.A. Vanstone, Handbook of Applied Cryptography, CRC Press, 1997 (local copy).
		A new practical algorithm for the construction of a perfect hash function, M. Atici, D. Stinson, and R. Wei, Submitted to Algorithmica (local copy).
	www.securitytechnet.com /crypto/algorithm/hash.html (964 words)

	SecurityStats.Com Awareness Tools - Dictionary Based Hash Lookup
		Hash algorithms are fundamental to many cryptographic applications.
		MD5: is an algorithm that is used to verify data integrity through the creation of a 128-bit message digest from data input (which may be a message of any length) that is claimed to be as unique to that specific data as a fingerprint is to the specific individual.
		MD4: is an earlier version of MD5, an algorithm used to verify data integrity through the creation of a 128-bit message digest from data input (which may be a message of any length) that is claimed to be as unique to that specific data as a fingerprint is to the specific individual.
	www.securitystats.com /tools/hashcalc.php (518 words)

	Dr. Dobb's \| SHA: The Secure Hash Algorithm \| July 22, 2001 (Site not responding. Last check: 2007-10-26)
		The Secure Hash Algorithm (SHA) was developed by the National Institute of Standards and Technology (NIST) and published as a federal information-processing standard (FIPS PUB 180) in 1993.
		SHA is used as part of the new Digital Signature Standard from NIST, but it can be used in any security application that requires a hash code.
		SHA has the property that every bit of the hash code is a function of every bit in the input.
	www.ddj.com /184409215?pgno=5 (1307 words)

	SHA1 version 1.0
		This document provides an overview of the Secure Hashing Algorithm, and details how a SHA1 digest is encoded in a DSig 1.0 Resource Reference Information Extension, providing the digest of a referenced web resource.
		The Secure Hash Algorithm (SHA), developed by NIST, along with the NSA, for use with the Digital Signature Standard (DSS) is specified within the Secure Hash Standard (SHS) [National Institute of Standards and Technology (NIST).
		ie if you have a hash for document A, H(A), it is difficult to find a document B which has the same hash, and even more difficult to arrange that document B says what you want it to say.
	www.w3.org /TR/1998/REC-DSig-label/SHA1-1_0 (542 words)

	The Secure Hash Algorithm Directory - MD5, SHA-1, HMAC and other Cryptography Resources
		Hash algorithms are fundament to many cryptographic applications.
		SHA-1: The Secure Hash Algorithm (SHA) was developed by NIST and is specified in the Secure Hash Standard (SHS, FIPS 180).
		Note that The Hash Calculator itself was built using this toolset and that the Calculator will also give suggested formats for calling the DLLs when an operation is performed (in the bottom right hand corner of the window)!.
	www.secure-hash-algorithm-md5-sha-1.co.uk (696 words)

	SSH - Support - Cryptography A-Z - Algorithms - Cryptographic Hash Functions
		Cryptographic hash functions are used in various contexts, for example to compute the message digest when making a digital signature.
		A hash function compresses the bits of a message to a fixed-size hash value in a way that distributes the possible messages evenly among the possible hash values.
		It uses universal hashing as its design principle, allowing for a rigorous proof of its security under randomness assumptions for the keys.
	www.ssh.com /support/cryptography/algorithms/hash.html (416 words)

	JavaScript MD5
		The MD4, MD5 and SHA-1 algorithms are all secure hash functions.
		This number is a hash of the input - a small change in the input results in a substantial change in the output number.
		The functions are thought to be secure in the sense that it requires an enormous amount of computing power and time to find a string which hashes to a chosen value.
	www-adele.imag.fr /~donsez/cours/exemplescourstechnoweb/js_securehash (608 words)

	NIST ANNOUNCES TECHNICAL CORRECTION TO SECURE HASH STANDARD (Site not responding. Last check: 2007-10-26)
		The Secure Hash Standard, adopted as a federal information processing standard (FIPS 180) in May 1993, can be used for computing a digital signature and remains a highly secure way to ensure the integrity and authenticity of data used in electronic mail, electronic funds transfer, software distribution and data storage applications.
		Researchers at the National Security Agency, who developed the formula and discovered the flaw in a continuing evaluation process, now believe that although the formula in FIPS 180 is less secure than originally thought, it is still extremely reliable as a technical computer security mechanism.
		The Secure Hash Standard specifies a secure hash algorithm for computing a condensed representation of a message or data file.
	www.nist.gov /public_affairs/releases/hashstan.htm (433 words)

	Atlan Laboratories: Algorithm Resources
		AES Algorithm Validation Suite (AESAVS)- This document describes each of the tests that must be performed to validate AES implementations.
		Digital Signature Algorithm Validation System (DSAVS) - This document describes the tests necessary to validate the DSA digital signature algorithm.
		Secure Hash Algorithm Validation System (SHAVS) - This document describes the tests necessary to validate the SHA hashing algorithms.
	www.atlanlabs.com /resources/algorithm_res.htm (226 words)

	JavaSecurity Algorithm Naming (Site not responding. Last check: 2007-10-26)
		Implementors of algorithms should use the standard names whenever they are defined, and should only define new ones when none exist for the algorithm.
		Names are that of algorithms as defined in standards, not of standards themselves (i.e.
		Secure Hash Algorithm, as defined in NIST's Secure Hash Standard document, fip-180-1.
	www.public.iastate.edu /~java/docs/guide/security/algorithms.html (171 words)

	FIPS 180-1 - Secure Hash Standard
		Specify the secure hash algorithm to be used whenever a secure hash algorithm is required for Federal applications; and
		Qualifications: While it is the intent of this standard to specify a secure hash algorithm, conformance to this standard does not assure that a particular implementation is secure.
		The Secure Hash Algorithm (SHA-1) is required for use with the Digital Signature Algorithm (DSA) as specified in the Digital Signature Standard (DSS) and whenever a secure hash algorithm is required for federal applica- tions.
	www.itl.nist.gov /fipspubs/fip180-1.htm (2844 words)

	[No title] (Site not responding. Last check: 2007-10-26)
		The output format is a list of SHA1 hashes in hex followed by the corresponding filenames, one per line.
		Hashes the files listed on the command line and outputs their SHA1 message digests as 40 hexadecimal digits, followed by the filename, one per line.
		This string is coincidentally one of the test vectors specified in FIPS 180-1 and should output: I.
	www.hashcash.org /docs/sha1-hashcash.pod (412 words)

	What is SHA-1 (Secure Hash Algorithm)?
		SHA-1 (Secure Hash Algorithm) is a most commonly used from SHA series of cryptographic hash functions, designed by the National Security Agency of USA and published as their government standard.
		Original SHA (or SHA-0) also produce 160-bit hash value, but SHA-0 has been withdrawn by the NSA shortly after publication and was superseded by the revised version commonly referred to as SHA-1.
		SHA-0 published in 1993 as the Secure Hash Standard, FIPS PUB 180 by National Institute of Standards and Technology.
	www.accuhash.com /what-is-sha1.html (195 words)

	10.4 sha -- SHA-1 message digest algorithm
		This module implements the interface to NIST's secure hash algorithm, known as SHA-1.
		SHA-1 is an improved version of the original SHA hash algorithm.
		The Secure Hash Algorithm is defined by NIST document FIPS PUB 180-2:
	www.python.org /doc/current/lib/module-sha.html (262 words)

	CAST SHA-1 Secure Hash Algorithm Cryptoprocessor Core
		This core is a fully compliant implementation of the Secure Hash Algorithm, SHA-1.
		The SHA-1 algorithm is based on principles similar to those used by Professor Ronald L. Rivest of MIT when designing the MD4 message digest algorithm, and is closely modeled after that algorithm.
		The SHA core is ready to accept data when REQ is asserted.
	www.cast-inc.com /cores/sha-1/index.shtml (726 words)

	sha(3): Secure Hash Algorithm - Linux man page
		SHA1, SHA1_Init, SHA1_Update, SHA1_Final - Secure Hash Algorithm
		(Secure Hash Algorithm) is a cryptographic hash function with a 160 bit output.
		SHA1_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).
	www.die.net /doc/linux/man/man3/sha.3.html (194 words)

	[No title] (Site not responding. Last check: 2007-10-26)
		ANEW --Sha-1-- \ Wil Baden 1999-08-19 \ ********************************************************************* \ * * \ * SHA-1 Secure Hash Algorithm * \ * * \ * SHA-INIT (--) * \ * Initialize the secure hash algorithm.
		\ Secure Hash Algorithm-1 (SHA-1) \ A one-way cryptographic function which takes a message of less \ than 18 quintillion (18,446,744,073,709,551,616) bits in length \ and produces a 160-bit message digest.
		\ NIST and NSA designed the Secure Hash Algorithm for Standard \ Digital Signatures and for whenever a secure hash algorithm is \ required for Federal applications.
	home.earthlink.net /~neilbawd/sha1.txt (1254 words)

	Open Source (BSD Licensed) Secure Hash Algorithm (SHA) Implementations in C by Aaron Gifford, including SHA-1, SHA-224, ...
		WHAT IT IS: The files sha2.h and sha2.c implement the SHA-224, SHA-256, SHA-384, and SHA-512 hash algorithms as described in the PDF documents found at the http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf http://csrc.nist.gov/publications/fips/fips180-2/FIPS180-2_changenotice.pdf The interface is similar to the interface to SHA-1 found in the OpenSSL library.
		The file sha2prog.c is a simple program that accepts input from either STDIN or reads one or more files specified on the command line, and then generates the specified hash (either SHA-224, SHA-256, SHA-384, SHA-512, any combination thereof, or all four hashes at once).
		WARNING: Some of the test output hashes are NOT from NIST's documentation and are the output of this implementation and so may be incorrect.
	www.adg.us /computers/sha.html (2302 words)

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