×

Application of secret sharing schemes at multiple levels of a dispersed storage network

  • US 10,331,519 B2
  • Filed: 11/06/2017
  • Issued: 06/25/2019
  • Est. Priority Date: 10/08/2012
  • Status: Active Grant
First Claim
Patent Images

1. A method comprises:

  • dispersed storage error encoding, by a computing device of a dispersed storage network (DSN), a data segment of a data file to produce a set of encoded data shares, wherein the dispersed storage error encoding uses a first threshold based secret sharing scheme in accordance with first secret sharing parameters;

    selecting, by the computing device, a set of storage units of the DSN for storing the set of encoded data shares;

    sending, by the computing device, the set of encoded data shares to the set of storage units;

    receiving, by a first storage unit of the set of storage units, a first encoded data share of the set of encoded data shares;

    encoding, by the first storage unit, the first encoded data share using a second threshold based secret sharing scheme in accordance with second secret sharing parameters to produce a first set of encoded data sub-shares, wherein the first secret sharing parameters differ from the second secret sharing parameters; and

    storing, by the first storage unit, the first set of encoded data sub-shares in a set of memory devices of the first storage unit, wherein a threshold number of encoded data sub-shares of the first set of encoded data sub-shares is decodable to recover the first encoded data share.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×