International Business Machines Corporation

Trent Balta

Marc Henri Coq

Colette Manoni

Collin Walling

Eugene E Nitka

Anthony Thomas Sofia

Luis Angel D Bathen

Michael Terrence Cohoon

Torin Reilly

Corey McQuay

Dulce Beatriz Ponceleon

Jason G Katonica

Aspects include receiving a notification that a value of a data element stored in a source storage location in a source format has been changed to an updated value. The change is replicated to a plurality of target storage locations. The replicating includes, for each of the plurality of target storage locations, determining a target format of the data element in the target storage location. The target format is one of a plurality of different formats, including the source format. Each of the different formats provide a different level of data protection for the data element. In response to determining that the target format is not the same as the source format, the updated value of the data element is converted into the target format, and the updated value of the data element is stored in the target format at the target storage location.

Distribution of user specific data elements in a replication environment

A described method includes receiving, by a database system, an instruction to change a first data element in a table in a database, which includes a first copy and a second copy of the table. A first entry is created in a first change-table. The first entry includes an updated value for a first data element. A second entry is created in a second change-table. Creating the second entry includes, changing the updated value into a ciphertext if the first data element is secured, and storing the ciphertext into the second entry. If the first data element is non-secured, the updated value is stored into the second entry as is. The second copy of the table is modified using the second change-table. The second copy of the table is used to respond to subsequent queries.

Secure data replication in distributed data storage environments

An example operation may include one or more of identifying a group of blockchain member devices attempting to establish a trusted group communication channel, assigning each of the blockchain member devices public/private key pairs, publishing the public keys of the blockchain member devices in a list, identifying a request from a first blockchain member device requesting a private key, associated with a second blockchain member device, be applied to a predetermined nonce value, responsive to identifying a response to the request, verifying, via a public key assigned to the first blockchain member device, that the second blockchain member device is a trusted member of the group of blockchain member devices, and responsive to verifying the second blockchain member device is a trusted member of the group of blockchain member devices, permitting communication between the first blockchain member device and the second blockchain member device on the trusted group communication channel.

Ad-hoc trusted groups on a blockchain

An example operation may include one or more of: creating a document that defines procedures to create an ad-hoc group having an original peer, to add a new peer to the ad-hoc group and to remove of one or more of the original peer and the new peer; maintaining, via a memory, a cryptographic distributed ledger based on the document and peer data associated with the ad-hoc group; encrypting the document; encrypting the cryptographic distributed ledger; providing the encrypted cryptographic distributed ledger to the ad-hoc group; decrypting the encrypted document; modifying the document; decrypting the encrypted cryptographic distributed ledger; updating the cryptographic distributed ledger; encrypting the modified document to create an encrypted modified document; encrypting the updated cryptographic distributed ledger; and providing the updated encrypted cryptographic distributed ledger to the ad-hoc group.

Consensus based ad-hoc group creation

An example operation may include one or more of storing a unique identification code encapsulating encoded information about a trusted group of member devices within a decentralized network, the unique identification code being generated by the trusted group of member devices, decoding the stored unique identification code to generate decoded information which verifies that the user device is a member device of the trusted group of member devices and provides contact information for other member devices of the trusted group of member devices, and establishing a communication session with the trusted group of member devices based on the contact information obtained by decoding the unique identification code.

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Poughkeepsie, NY, United States of America

Trent Balta