Outsourcing data deduplication cloud storage method supporting privacy and integrity protection
A technology for integrity protection and outsourcing data, used in digital data protection, digital transmission systems, key distribution, and can solve similar data complex technical problems
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0113] An outsourced data deduplication cloud storage method that supports privacy and integrity protection, including the following steps:
[0114] 1) System establishment
[0115] 1.1 System parameter establishment:
[0116] The key generation center KGC generates and discloses system parameters
[0117] cp=(p,G,G T , e, H, Hash, Enc, Dec, Extrator( , ), (n, k)RS), where p is a large prime number selected according to the security parameters; G and G T is a multiplicative cyclic group randomly selected in the environment of the PBC cryptographic library with two orders of large prime number p; e: G×G→G T is a prescribed bilinear pair; H: {0, 1} * →G is a safe anti-collision hash function selected by Cryptopp password library, Hash is a safe anti-collision hash algorithm, such as MD5 algorithm or SHA1 algorithm, etc. (Enc, Dec) is a pair of symmetric encryption and decryption Algorithm, such as AES algorithm or DES algorithm, Extrator( , ) is an anti-leakage binary extra...
Embodiment 2
[0135] On the basis of Example 1, when the file tag Tag F Does not exist, original owner DO 0 Continue to perform storage, the specific steps are as follows:
[0136] a1) Key extraction and file encryption block:
[0137] First, the original owner DO 0Using the extractor, input the file F and the seed s selected by the key generation center KGC, and extract the encryption key K of the file F F = Extractor(F; s);
[0138] Second, the original owner DO 0 Use the symmetric encryption and decryption algorithm (Enc, Dec) agreed by the key generation center KGC to encrypt the file F to generate the file ciphertext C F =Enc(F;K F );
[0139] Then, use the (n, k) RS erasure code specified by the key generation center KGC to encrypt the file ciphertext C F Encode and chunk to get chunked file C F '={C 1 , C 2 ,Λ,C n}, n is the total number of blocks of the file F, so that the file ciphertext C F can be made by C F '={C 1 , C 2 ,Λ,C n} in any k file blocks can be restor...
Embodiment 3
[0147] On the basis of Example 1, when the file tag Tag F exists, the successor owner DO t (t=1, 2, Λ, W) provide the ownership certificate of the file F to the cloud service provider CSP, and the cloud service provider CSP sends the successor owner DO according to the ownership certificate t (t=1, 2, Λ, W) Feedback result, with the data owner DO of the second upload file F 1 For example, the specific steps are as follows, other successor owners DO t The steps of (t=2, 3, Λ, W) are similar:
[0148] a2) File extraction and chunking:
[0149] First, the successor owner DO 1 Use the same extractor algorithm to calculate the encryption key K for the file F held by yourself F = Extractor(F; s);
[0150] Second, the successor owner DO 1 Use the encryption key KF and the symmetric encryption and decryption algorithm (Enc, Dec) disclosed by the key generation center KGC to encrypt the file F to generate the file ciphertext C F =Enc(F;K F );
[0151] Then, the successor owne...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com