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Blockchain: A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data .
Blockbuster LLC: Blockbuster, officially Blockbuster LLC and also known as Blockbuster Video, was an American-based provider of home movie and video game rental services. Services were offered primarily at video rental shops, but later alternatives included DVD-by-mail, streaming, video on demand, and cinema theater.
Block cipher mode of operation: In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity. A block cipher by itself is only suitable for the secure cryptographic transformation of one fixed-length group of bits called a block.
Blockade of the Gaza Strip: The blockade of the Gaza Strip is the ongoing land, air, and sea blockade of the Gaza Strip imposed by Israel and Egypt in 2007, after Hamas took control of the Gaza Strip during the Battle of Gaza, seizing government institutions and replacing Fatah and other Palestinian Authority officials with Hamas members. Hamas had previously refused to accept the conditions set by Israel and the Quartet on the Middle East for continued aid to the PA under a Hamas government including recognition by Hamas of Israel, the disavowal of violent actions, and acceptance of previous agreements between Israel and the PA, including the Oslo Accords.