Secure storage of anchor passphrase for DBMS

Patent metadata

Field	Value
Publication number	US-11444763-B2
Application number	US-202016875161-A
Country	US
Kind code	B2
Filing date	May 15, 2020
Priority date	May 15, 2020
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A system and method to receive, by a database service from an encryption service of a database provider in a cloud environment, an encryption key passphrase stored in a secure storage separate and distinct from a database persistence and object store of the database service, the encryption key passphrase used as a key to encrypt and decrypt a key storage of the database service that stores one or more keys used by the database service; and to use the encryption key passphrase by a recovery service of the database provider in the cloud environment to recover the database service and its associated key storage.

First claim

What is claimed is:

1. A system comprising:
a memory storing processor-executable program code; and
a processor to execute the processor-executable program code in order to cause the system to:
receive, by a database service from an encryption service of a database provider in a cloud environment, an encryption key passphrase;
encrypt a key storage managed by the database service using the encryption key passphrase, the key storage storing one or more encryption keys used by the database service;
store an encrypted backup of the key storage in an object store of the database service; and
store the passphrase in a secure storage that is separate and distinct from the object store of the database service and a data persistence of the database service.

2. The system of claim 1 , wherein the data persistence of the database service is an object store to store data backups of the database service.

3. The system of claim 1 , wherein the object store storing the encrypted backup of the key storage further stores encrypted backups of the database service.

4. The system of claim 1 , wherein the storing of the encrypted backup of the key storage in the object store of the database service is performed in response to an initialization of the database service.

5. The system of claim 1 , wherein the secure storage storing the encryption key passphrase is inaccessible by the database service.

6. The system of claim 1 , wherein the processor is further configured to execute the processor-executable program code in order to cause the system to:
initialize, in response to a request to recreate the database service, a new instance of the database service;
receive, by the new database service instance from a recovery service of the database provider, the encryption key passphrase;
access, using the encryption key passphrase received from the recovery service, the encrypted backup of the key storage in the object store of the database service;
perform, by the new database service instance, a recovery of the key storage using the encrypted backup of the key storage; and
perform, by the new database service instance, a recovery of data backups and log backups using the one or more encryption keys in the recovered key storage.

7. The system of claim 6 , wherein the encryption key passphrase is used once by the new instance of the database service to access the encrypted backup of the key storage.

8. A computer-implemented method, the method comprising:
receiving, by a database service from an encryption service of a database provider in a cloud environment, an encryption key passphrase;
encrypting a key storage managed by the database service using the encryption key passphrase, the key storage storing one or more encryption keys used by the database service;
storing an encrypted backup of the key storage in an object store of the database service; and
storing the passphrase in a secure storage that is separate and distinct from the object store of the database service and a data persistence of the database service.

9. The method of claim 8 , wherein the data persistence of the database service is an object store to store data backups of the database service.

10. The method of claim 8 , wherein the object store storing the encrypted backup of the key storage further stores encrypted backups of the database service.

11. The method of claim 8 , wherein the storing of the encrypted backup of the key storage in the object store of the database service is performed in response to an initialization of the database service.

12. The method of claim 8 , wherein the secure storage storing the encryption key passphrase is inaccessible by the database service.

13. The method of claim 8 , further comprising:
initializing, in response to a request to recreate the database service, a new instance of the database service;
receiving, by the new database service instance from a recovery service of the database provider, the encryption key passphrase;
accessing, using the encryption key passphrase received from the recovery service, the encrypted backup of the key storage in the object store of the database service;
performing, by the new database service instance, a recovery of the key storage using the encrypted backup of the key storage; and
performing, by the new database service instance, a recovery of data backups and log backups using the one or more encryption keys in the recovered key storage.

14. The method of claim 13 , wherein the encryption key passphrase is used once by the new instance of the database service to access the encrypted backup of the key storage.

15. A non-transitory, computer readable medium storing instructions, which when executed by at least one processor cause a computer to perform a method comprising:
receiving, by a database service from an encryption service of a database provider in a cloud environment, an encryption key passphrase;
encrypting a key storage managed by the database service using the encryption key passphrase, the key storage storing one or more encryption keys used by the database service;
storing an encrypted backup of the key storage in an object store of the database service; and
storing the passphrase in a secure storage that is separate and distinct from the object store of the database service and a data persistence of the database service.

16. The medium of claim 15 , wherein the data persistence of the database service is an object store to store data backups of the database service.

17. The medium of claim 15 , wherein the storing of the encrypted backup of the key storage in the object store of the database service is performed in response to an initialization of the database service.

18. The medium of claim 15 , wherein the secure storage storing the encryption key passphrase is inaccessible by the database service.

19. The medium of claim 15 storing instructions, which when executed by at least one processor cause a computer to perform a method further comprising: initializing, in response to a request to recreate the database service, a new instance of the database service; receiving, by the new database service instance from a recovery service of the database provider, the encryption key passphrase; accessing, using the encryption key passphrase received from the recovery service, the encrypted backup of the key storage in the object store of the database service; performing, by the new database service instance, a recovery of the key storage using the encrypted backup of the key storage; and performing, by the new database service instance, a recovery of data backups and log backups using the one or more encryption keys in the recovered key storage.

20. The medium of claim 19 , wherein the encryption key passphrase is used once by the new instance of the database service to access the encrypted backup of the key storage.

Assignees

• Sap Se

Inventors

• Voss Stefan
• Brunzema Martin
• Hempelmann Henrik
• Klus Benedikt
• Roessiger Anne

Classifications

• H04L9/0894 Primary

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

• G06F11/1458

  Management of the backup or restore process · CPC title

• G06F2201/82

  Solving problems relating to consistency · CPC title

• G06F11/1469

  Backup restoration techniques · CPC title

• G06F21/6218

  to a system of files or objects, e.g. local or distributed file system or database · CPC title