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Adam Back (born July 1970) is a British cryptographer and crypto-hacker. He is the inventor of hashcash, the proof-of-work system used by bitcoin and several anti-spam systems. Hashcash has also been used in a number of other protocols such as combating blog spam,〔(【引用サイトリンク】title=hashcash.org - blog plugins )〕 and defending against user namespace pollution.〔(【引用サイトリンク】title=I2P's Threat Model )〕 He implemented credlib,〔(【引用サイトリンク】title=credlib - Credential Library )〕 a library that implements the credential systems of Stefan Brands and David Chaum. He was the first to formalize the Non-Interactive Forward-Secrecy〔(【引用サイトリンク】title=Non-Interactive Forward Secrecy )〕 security property for email and to observe that any Identity Based Encryption scheme can be used to provide Non-Interactive Forward Secrecy. He is also known for pioneering the use of ultra-compact code with his 3-line RSA in Perl〔(【引用サイトリンク】title=export-a-crypto-system sig )〕 signature file and non-exportable T-shirts〔(【引用サイトリンク】title=Munitions T-shirt )〕 to protest the (now relaxed) United States cryptography export regulations. He has a computer science Ph.D. from University of Exeter. == See also == *Data security *Information privacy 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Adam Back」の詳細全文を読む スポンサード リンク
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