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A key aspect of privacy in blockchains is the use of private and public keys. Blockchain systems use asymmetric cryptography to secure transactions between users. [7] In these systems, each user has a public and private key. [7] These keys are random strings of numbers and are cryptographically related. [7]
Zcash is a privacy-focused cryptocurrency which is based on Bitcoin's codebase. [4] It shares many similarities, such as a fixed total supply of 21 million units. [5] Transactions can be transparent, similar to bitcoin transactions, or they can be shielded transactions which use a type of zero-knowledge proof to provide anonymity in ...
Keybase is a key directory that maps social media identities to encryption keys (including, but not limited to PGP keys) in a publicly auditable manner. [2] Additionally it offers an end-to-end encrypted chat and cloud storage system, [3] [4] called Keybase Chat and the Keybase Filesystem respectively.
Hyperledger Explorer is a blockchain module and one of the Hyperledger projects hosted by The Linux Foundation. Designed to create a user-friendly Web application, Hyperledger Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction ...
Attribute-based encryption is a generalisation of public-key encryption which enables fine grained access control of encrypted data using authorisation policies.The secret key of a user and the ciphertext are dependent upon attributes (e.g. their email address, the country in which they live, or the kind of subscription they have).
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Blockchain.info was established by Ben Reeves in 2011. He launched a website which could be used to track bitcoin transactions. [8] The website was a block explorer, a website that allowed bitcoin users to see the details of public cryptocurrency transactions if they have the identifying hash code for the transaction. [9]
A hash chain is similar to a blockchain, as they both utilize a cryptographic hash function for creating a link between two nodes. However, a blockchain (as used by Bitcoin and related systems) is generally intended to support distributed agreement around a public ledger (data), and incorporates a set of rules for encapsulation of data and ...