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Create an RSS feed from a twitter hash tag, limited to a set of users' tweets.
Tokyo Cabinet is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as a key and a value. There is neither concept of data tables nor data types. Records are organized in hash table, B tree, or fixed-length array.
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MD5 / SHA1 / SHA-256 / SHA-384 / SHA-512
I recently discovered memcached which is a distributed, object caching system originally developed by Brad Fitzpatrick of LiveJournal fame. You can think of memcached as a giant hash table that can run on multiple servers which automatically handles maintaining the balance of objects hashed to each server and transparently fetches/removes objects from over the network if they aren't on the same machine that is accessing an object in the hash table. Although this sounds fairly simple, there is a lot of grunt work in building a distributed object cache which handles data partitioning across multiple servers and hides the distributed nature of the application from the developer. memcached is a well integrated into the typical LAMP stack and is used by a surprising number of high traffic websites including Slashdot, Facebook, Digg, Flickr and Wikipedia. Below is what C# code that utilizes memcached would look like sans exception handling code
Data from the client computer is passed over 256-bit encrypted SSL into our own custom hashing system where it is immediately encrypted and then stored in our database.
PeaZip is a free, open source file and archive manager. PeaZip is cross platform, available as portable and installable software for 32 and 64 bit Windows (9x, 2000, XP, Vista) and Linux (PeaZip is a desktop neutral application). * create: 7Z, ARC, BZ2, GZ, PAQ/LPAQ, PEA, QUAD/BALZ, TAR, UPX, ZIP; * open: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF and many more archive types (79 file extensions supported, see full list). PeaZip allows to save archive's layouts; apply powerful multiple search filters to archive's content; handle multiple archives at once; export job definition as command line; bookmark archives and folders etc... Other features: AES256 encryption, robust file copy, split/join files (file span), secure file deletion, compare, checksum and hash files, system benchmark, generate random passwords and keyfiles.
The Java super class java.lang.Object has two very important methods defined in it. They are - * public boolean equals(Object obj) * public int hashCode()
an interesting review of hash functions and their performance over different sets of keys. Note that he measure the actual time for hashing + scanning through a collision list rather than just counting the numbers of collisions.
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ObPwd est une méthode simple et originale permettant de générer (hashing) des mot de passe de qualité en passant par des données numériques faciles à retenir : images, texte, URL, etc. L'auteur livre plusieurs prototypes d'applications dont une extension Firefox.
SlavaSoft HashCalc : Support of 12 well-known and documented hash and checksum algorithms: MD2, MD4, MD5, SHA-1, SHA-2( 256, 384, 512), RIPEMD-160, PANAMA, TIGER, ADLER32, CRC32. HashTab is a Windows shell extension which adds a tab called “File Hashes” to the Windows Explorer file properties. The tab contains the MD5, SHA1 and CRC-32 file hashes.
Pour cela, il utilise un outil opensource (dont le source est inclus a RockXP) qui permet de recuperer les mots de passe HASH de Windows. Ppwdump2.exe est détecté par certains antivirus comme un virus. Mais il n’y a rien à craindre
Les Rainbow Tables sont des fichiers contenant des mots de passe cryptés avec l’algo hash du LanManager de Windows.En gros, plus besoin de décrypter un mot de passe avec un bruteforce (qui essaye toutes les combinaisons) pour rentrer sur un PC Windows
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Je suis sur que ca passionera Gandour...
The main trick that history managers use is to have the browser believe the user navigated to a new url without the current page and all its JavaScript and DOM state being thrown away. The only part of the url that enables such a thing is the hash part. The hash part is what comes at the end of the url after a pound (#) sign. The original intent of this part of the url was to allow for navigation inside of the document. You would put a special named, href-less anchor tag in your document, and then navigating to #nameOfTheAnchor would just scroll the anchor into view. The page doesn't get reloaded, but it does enter the browser history.
YUI Browser History Manager does that for you, but lack of documenting how it works under the hood.
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The Resource Description Framework RDF allows the users to describe Web documents and resources from the real world—people, organisations, things—in a computer-processable way. Publishing such descriptions on the Web creates the Semantic Web. URIs (Uniform Resource Identifiers) are very important, forming the link between RDF and the Web. This document presents guidelines for their effective use. It discusses two strategies, called 303 URIs and hash URIs. It gives pointers to several Web sites that use these solutions, and briefly discusses why several other proposals have problems.