论文标题
在仅附加区块链中删除（简短的摘要 /正在进行的工作）
Enabling Deletion in Append-Only Blockchains (Short Summary / Work in Progress)
论文作者
论文摘要
具有仅附加语义的常规区块链实现不支持已确认的块中的删除或覆盖数据。但是，许多与行业相关的用例都需要删除数据的能力，尤其是在存储个人身份信息或必须限制数据增长时。现有的试图调和这些矛盾构成了区块链范式的核心品质，因为它们包括类似后门式的方法，例如具有较高权利或使用专业变色龙哈希算法的中央当局在块中的链接。在这份技术报告中，我们概述了区块链分类帐和共识的新型体系结构，该结构使用了具有同时有效性的上下文链的树。上下文链捕获了封闭的实体和人员组的交易，因此以精确定义的方式构建块。由此产生的上下文隔离可以对整个上下文的共识删除，而没有对其他上下文的副作用。该体系结构打开了截断，数据翻转和关注点分离的可能性，并可以帮助符合GDPR法规。
Conventional blockchain implementations with append-only semantics do not support deleting or overwriting data in confirmed blocks. However, many industry-relevant use cases require the ability to delete data, especially when personally identifiable information is stored or when data growth has to be constrained. Existing attempts to reconcile these contradictions compromise on core qualities of the blockchain paradigm, as they include backdoor-like approaches such as central authorities with elevated rights or usage of specialized chameleon hash algorithms in chaining of the blocks. In this technical report, we outline a novel architecture for the blockchain ledger and consensus, which uses a tree of context chains with simultaneous validity. A context chain captures the transactions of a closed group of entities and persons, thus structuring blocks in a precisely defined way. The resulting context isolation enables consensus-steered deletion of an entire context without side effects to other contextes. This architecture opens the possibility of truncation, data rollover and separation of concerns, and can help to fulfill the GDPR regulations.
