Secure database backup and recovery

Patent metadata

Field	Value
Publication number	US-9929861-B2
Application number	US-201715497311-A
Country	US
Kind code	B2
Filing date	Apr 26, 2017
Priority date	Nov 6, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

As disclosed herein a computer system for secure database backup and recovery in a secure database network has N distributed data nodes. The computer system includes program instructions that include instructions to receive a database backup file, fragment the file using a fragment engine, and associate each fragment with one node, where the fragment is not stored on the associated node. The program instructions further include instructions to encrypt each fragment using a first encryption key, and store, randomly, encrypted fragments on the distributed data nodes. The program instructions further include instructions to retrieve the encrypted fragments, decrypt the encrypted fragments using the first encryption key, re-encrypt the decrypted fragments using a different encryption key, and store, randomly, the re-encrypted fragments on the distributed data nodes. A computer program product and method corresponding to the above computer system are also disclosed herein.

First claim

What is claimed is:

1. A method for secure database backup and recovery in a secure database network having N distributed data nodes, wherein N is an integer greater than 2, the method comprising:
receiving a database backup file from a database system;
fragmenting the file into n fragments, wherein n is an integer greater than 2;
associating each fragment with a data node of the N distributed data nodes that will not be used to store the fragment;
encrypting each fragment of the n fragments using a first key;
storing the n fragments on the N distributed data nodes whereby no fragment is stored on its associated data node;
retrieving the n fragments a determined time later from the N distributed data nodes;
decrypting each fragment of the n fragments using the first key;
encrypting each fragment of the n fragments again with a different key;
storing the n fragments again on the N distributed data nodes whereby no fragment is stored on its associated data node;
wherein after retrieving each fragment from a respective data node, said fragment is stored again on a different data node from the data node it was retrieved from, and
wherein determining fragment data node location is performed by a sensor in the data node:
that monitors communications traffic between data nodes and
that listens for communications requests and sends back responses including stored fragments.

2. The method of claim 1 wherein storing and retrieval of the n fragments is performed by agents in the database system and sensors in the data nodes whereby fragment node location is not stored in the database system.

3. The method of claim 2 further comprising using a key generator and store to fragment the key;
encrypt each key fragment; and
store each encrypted key fragment with a backup fragment.

4. The method of claim 3 wherein database metadata is added to the fragment whereby database metadata is fragmented and distributed.

5. The method of claim 4 wherein the database metadata includes, but is not limited to, network configuration, database node locations and backup image expiration.

6. The method of claim 5 wherein the encryption is public/private key encryption.

Assignees

• IBM

Inventors

• Barbas Pedro M
• Duffy Joseph
• Maycock Ken
• Tilson David M

Classifications

• H04L9/0894

  Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage · CPC title

• G06F11/1448

  Management of the data involved in backup or backup restore · CPC title

• G06F21/6209

  to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself · CPC title

• H04N21/2318

  using striping · CPC title

• G06F2201/80

  Database-specific techniques · CPC title