Patent ID: 11860863
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. A method, comprising:
receiving, at one or more computing devices implementing a database, a request to redact first data from an item in the database, wherein the database implements a journal to record transactions committed to the database, wherein the journal records the transactions performed on individual items of the database in corresponding ones of a plurality of blocks in a cryptographically verifiable hash chain along with corresponding versions of the individual items produced by the transactions;
identifying, by the one or more computing devices, one of the plurality of blocks of the journal that comprises a version of the item including the first data; and
replacing, by the one or more computing devices, the version of the item including the first data in the identified block with a hash value, wherein after the version of the item is replaced with the hash value, the block preserves an ability to be cryptographically verifiable with other ones of the plurality of blocks in the hash chain.