using crc32 as a unique key
CRC32 Hash Collision Probability - Ars Technica OpenForum
Jan 22, 2008 . This means that you stand a 1% chance of collision with roughly 10000 . I generally see CRC being used to produce unique keys for data.
http://arstechnica.com/civis/viewtopic.php?f=20&t=149670
Unique Keys, Hashing, and Encryption – Dacris Software
Aug 18, 2011 . Let's start with normal (not globally unique) keys. . CRC (Cyclic Redundancy Check) is a very basic hash function that generates a 32-bit hash .
http://www.dacris.com/blog/2011/08/18/unique-keys-hashing-and-encryption/ Derived unique key per transaction - Wikipedia, the free encyclopedia
In cryptography, Derived Unique Key Per Transaction (DUKPT) is a key . The encryption is done with a derived key, which is not re-used after the transaction. DUKPT . check (LRC) or a 2 hexadecimal digit cyclical redundancy check (CRC ).
http://en.wikipedia.org/wiki/Derived_unique_key_per_transaction Temporal Key Integrity Protocol - Wikipedia, the free encyclopedia
TKIP ensures that every data packet is sent with a unique encryption key. . This is because although TKIP continues to use the CRC32 checksum mechanism, .
http://en.wikipedia.org/wiki/Temporal_Key_Integrity_Protocol
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algorithm - unique integer/long hash key generation over strings for ...
Jul 2, 2009 . unique integer/long hash key generation over strings for faster compairson . The only problem I can see is that with a large number of unique . We use CRC-32 and it is very effective for this (basically 1 chance in 2^32 that a .
http://stackoverflow.com/questions/1075250/unique-integer-long-hash-key-generation-over-strings-for-faster-compairson
asp.net - Shorter GUID using CRC - Stack Overflow
Jul 26, 2009 . A CRC of a GUID would not be unique, no. . Also, if your users are stored in the database with a GUID key, you'd have trouble finding the user .
http://stackoverflow.com/questions/1184441/shorter-guid-using-crc FMEpedia - Creating a Unique identifier using CRCCalculator
Aug 3, 2011 . These can be cumbersome to work with in an FME workflow (i.e. FeatureMerger) so combinging the natural key into a single CRC unique ID .
http://fmepedia.safe.com/articles/Samples_and_Demos/Creating-a-Unique-identifier-using-CRCCalculator Performance benchmark of CRC32, MD5 and SHA1 ...
Jun 29, 2009 . However in my use case, I need to concatenate several requests params to create a unique key for my cached data. So I fought of using some .
http://blog.thecodingfrog.com/2009/06/performance-benchmark-of-crc32-md5-and.html MySQL Lists: mysql: Re: LAST_INSERT_ID and CRC32
May 3, 2009 . Other than perpopulating another table with possibe crc values then . NOT NULL, > PRIMARY KEY (`id`), > UNIQUE KEY `id-crc` (`id-crc`) .
http://lists.mysql.com/mysql/217382 Add hash column to {locales_source} to query faster locale strings ...
Jul 12, 2010 . drupal_hash_base64 is too complex in this case ?? we only need an unique key here. using CRC32 is another choose. from l10n, we only .
http://drupal.org/node/851362 Generating unique integer IDs from strings in MySQL | GreenAsh
Mar 19, 2010 . Unfortunately, most of the tables I'm working with have primary keys that are either . (you could make it a unique key, but that's not really necessary). . a single duplicate (I also experimented briefly with CRC32 checksums, .
http://greenash.net.au/thoughts/2010/03/generating-unique-integer-ids-from-strings-in-mysql/
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Keysum - Using a checksum for a primary key - Data Management ...
Sep 25, 2007 . For example using the industry standard CRC32 algorithm will generate a . significant and therefore the key can be considered unique.
http://www.datamgmt.com/index.php?module=article&view=42
Cyclic Redundancy Checks
For example, suppose we want our CRC to use the key k=37. . uniquely in this way, i.e., as a polynomial in the base 2 with coefficients that are either 0 or 1.
http://www.mathpages.com/home/kmath458.htm Modelling free text comments
Oct 24, 2010 . To do this, I generate a checksum of the text (I like to use the CRC32 function) and use that as a non-unique natural key to the dimension (with .
http://forum.kimballgroup.com/t784-modelling-free-text-comments Smart Energy ECC-Enabled Device Setup Process -120-5070-000B
support Smart Energy (SE) security, which is based on certificate-based key establishment . Application setup (run time) if using unique link keys. •. Joining a . from the installer) using the CRC16 algorithm described in the "CRC Algorithm .
http://www.ember.com/pdf/120-5070-000_SmartEnergyECCEnabledDeviceSetupProcess.pdf Outlook passwords
Use strong passwords that combine upper- and lowercase letters, numbers, and . CRC32's most vulnerable thing is that the 32-bit length of the password hash is . A new encryption algorithm that uses the encryption key and unique record .
http://www.passcape.com/outlook_passwords [#DIRECTMEMORY-63] Investigate removing the need for an on ...
I also tried using CRC32 instead of keys but didn't work out well (too hard to . As each key has to be unique, and a hash is a unique value representing that key, .
https://issues.apache.org/jira/browse/DIRECTMEMORY-63 Generating Shortcodes like Shorturl/tinyurl - PHPBuilder.com
How exactly would i go about making a unique key using the url? Code: $ shortcode = crc32($url);. Then i would make the record id the primary .
http://www.phpbuilder.com/board/showthread.php?t=10363209 PHP: mt_srand - Manual
Seeds the random number generator with seed or with a random value if no seed is given. . mt_srand(crc32(microtime())); . If you generate a random "unique" 100-character key for say cookie use, seeding as above, you will likely get a .
http://php.net/manual/en/function.mt-srand.php PGP Command Line - Freeware User's Guide
Portions of this software may use public key algorithms described in U.S. Patent numbers . “Handbook of Applied Cryptography,” CRC Press; ISBN: 0-8493- 8523-7 . do this by comparing the unique fingerprint on your copy of someone's .
http://www.cs.sjsu.edu/CRC/documentation/PGPCmdLineGuide.pdf
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20.3 Cyclic Redundancy and Other Checksums
whole files) with a statistically unique “key,” its CRC. Aggregates of any size can then be compared for identity by comparing only their short CRC keys. Differing .
http://www.foo.be/docs-free/Numerical_Recipe_In_C/c20-3.pdf How Ice Machine Salesmen Can Lie To You To Make using crc32 as a unique key Sale
USB Developers FAQ - Jan Axelson's Lakeview Research
The ports do not have unique port addresses as parallel and serial ports do. . You can obtain the key from a device using SetupDi functions, and obtain the same key from a hub port using . How is the USB data CRC value calculated?
http://www.lvr.com/usbfaq.htm Ice Machine Article Directory #1
PMAfob Software Example V1.2
With respect to any examples or hints given herein, any typical values stated herein and/or any information . Change unique key number (PMA or user defined) . CRC. EOM. XTEA encryption. RUNIN .. Run in sequence ( synchronisation) .
http://www.infineon.com/dgdl/PMA71xx_PMA51xx_PMAfobSoftwareExample_V1.2.pdf?folderId=db3a30431689f4420116a096e1db033e&fileId=db3a304320d39d5901212e477713142e
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