01315nam a2200205   4500001000700000010001800007100004100025101000800066200012800074210006500202215002000267300004800287330063400335606001800969606003500987606003001022606002501052606001501077700001701092396092  a9789292044671  a20210305d2020       y0pory50      ba  aeng  aCrypto assetsbRecurso eletrónicoean introduction to digital currencies and distributed ledger technologiesfNigel Smart  aAttikicEuropean Union Agency for Cybersecurity, ENISAd2020  a1 CD-ROMd12 cm  aFicheiro de 3,34 MB em formato PDF (29 p.).  a1. The genesis of bitcoin. 1.1 Hash functions. 1.2 Merkle tree. 1.3 Digital signature. 1.4 Secret sharing. 1.5 Byzantine agreement. 1.6 Electronic cash. 1.7 Zero-knowledge. 1.8 Time stamps. 1.9 Multi-party computation and threshold cryptography. 1.10 Proof of work. 2. Distributed Ledger Technologies and bitcoin. 2.1 The word ‘ledger’. 2.2 The word ‘distributed’. 2.3 The words ‘Distributed Ledger Technology’. 2.4 Provisioned blockchains. 2.5 Non-provisioned blockchains. 2.6 Rewarding validators. 3. Applications. 4. Smart contracts. 5. Securing secret keys. 6. Zero-knowledge proofs. 7. Conclusions. Bibliography.  aMOEDA VIRTUAL  aINFORMAÇÃO GEOREFERENCIADA  aSEGURANÇA INFORMÁTICA  aSEGURANÇA DE DADOS  aTECNOLOGIA  aSMARTbNigel