Secure Proof of Ownership Using Merkle Tree for Deduplicated Storage

2020 ◽  
Vol 54 (4) ◽  
pp. 358-370
Author(s):  
Jay Dave ◽  
Avijit Dutta ◽  
Parvez Faruki ◽  
Vijay Laxmi ◽  
Manoj Singh Gaur
Keyword(s):  
Merkle Tree ◽  
Proof Of Ownership

scholarly journals What If Keys Are Leaked? towards Practical and Secure Re-Encryption in Deduplication-Based Cloud Storage

Information ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 142
Author(s):  
Weijing You ◽  
Lei Lei ◽  
Bo Chen ◽  
Limin Liu
Keyword(s):  
Experimental Evaluation ◽  
Cloud Storage ◽  
Security Analysis ◽  
Encrypted Data ◽  
Cloud Data ◽  
Storage Cost ◽  
Outsourced Data ◽  
Proof Of Ownership ◽  
Client Side ◽  
Over Time

By only storing a unique copy of duplicate data possessed by different data owners, deduplication can significantly reduce storage cost, and hence is used broadly in public clouds. When combining with confidentiality, deduplication will become problematic as encryption performed by different data owners may differentiate identical data which may then become not deduplicable. The Message-Locked Encryption (MLE) is thus utilized to derive the same encryption key for the identical data, by which the encrypted data are still deduplicable after being encrypted by different data owners. As keys may be leaked over time, re-encrypting outsourced data is of paramount importance to ensure continuous confidentiality, which, however, has not been well addressed in the literature. In this paper, we design SEDER, a SEcure client-side Deduplication system enabling Efficient Re-encryption for cloud storage by (1) leveraging all-or-nothing transform (AONT), (2) designing a new delegated re-encryption (DRE), and (3) proposing a new proof of ownership scheme for encrypted cloud data (PoWC). Security analysis and experimental evaluation validate security and efficiency of SEDER, respectively.

Metadata-based measurements transmission verified by a Merkle Tree

2021 ◽  
Vol 219 ◽  
pp. 106871
Author(s):  
Mario José Diván ◽  
María Laura Sánchez-Reynoso
Keyword(s):  
Merkle Tree

scholarly journals Balancing Access Control and Privacy for Data Deduplication via Functional Encryption

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Bo Mi ◽  
Ping Long ◽  
Yang Liu ◽  
Fengtian Kuang
Keyword(s):  
Access Control ◽  
Security Analysis ◽  
Functional Encryption ◽  
Data Deduplication ◽  
Paper Briefly ◽  
Storage Security ◽  
Redundancy Removal ◽  
Proof Of Ownership ◽  
Learning With Errors ◽  
And Storage

Data deduplication serves as an effective way to optimize the storage occupation and the bandwidth consumption over clouds. As for the security of deduplication mechanism, users’ privacy and accessibility are of utmost concern since data are outsourced. However, the functionality of redundancy removal and the indistinguishability of deduplication labels are naturally incompatible, which bring about a lot of threats on data security. Besides, the access control of sharing copies may lead to infringement on users’ attributes and cumbersome query overheads. To balance the usability with the confidentiality of deduplication labels and securely realize an elaborate access structure, a novel data deduplication scheme is proposed in this paper. Briefly speaking, we drew support from learning with errors (LWE) to make sure that the deduplication labels are only differentiable during the duplication check process. Instead of authority matching, the proof of ownership (PoW) is then implemented under the paradigm of inner production. Since the deduplication label is light-weighted and the inner production is easy to carry out, our scheme is more efficient in terms of computation and storage. Security analysis also indicated that the deduplication labels are distinguishable only for duplication check, and the probability of falsifying a valid ownership is negligible.

scholarly journals ANALISIS YURIDIS HAK EIGENDOM VERPONDING SEBAGAI JAMINAN KEBENDAAN

2020 ◽  
Vol 2 (1) ◽  
pp. 38-55
Author(s):  
Irman Widi Kurniawan ◽  
Etty Mulyati ◽  
Betty Rubiati
Keyword(s):  
Research Method ◽  
Land Rights ◽  
Status Quo ◽  
Legal Certainty ◽  
Proof Of Ownership ◽  
The Status ◽  
The Right ◽  
Legal Consequences ◽  
Legal Force

ABSTRAKDi dalam bagian kedua UUPA mengatur tentang pelaksanaan konversi hak atas tanah menjadi wujud kepastian hukum sebagaimana ketentuan Pasal 33 ayat (3) UUD 1945. Namun kepastian hukum terhadap konversi Hak atas tanah barat terutama sertifikat Hak Eigendom Verponding masih menjadi problematika tersendiri bagi masyarakat yang memiliki bukti kepemilikan hak atas tanah barat tersebut apabila dijadikan sebuah jaminan guna memperoleh fasilitas kredit. Metode penelitian yang digunakan ialah yuridis normatif dengan kajian bahan hukum primer, sekunder serta tersier. Berdasarkan pembahasan tersebut bahwa Kepastian Hukum terkait konversi hak Eigendom Verponding telah memiliki kekuatan hukum mengikat dengan ketentuan diperlukan konversi sehingga dapat dijadikan objek jaminan namun dalam prakteknya masih terdapat objek jaminan dengan tidak memperhatikan asal mula objek jaminan tersebut serta akibat hukum terhadap konversi hak atas tanah tersebut adalah pemberlakuan UUPA menjadi dasar bahwasanya prinsip status quo hak atas tanah terdahulu memberikan jaminan kepastian hukum dengan ketentuan hak-hak lama menjadi tidak diakui keberadaannya. Kata Kunci: hak atas tanah; hak barat; kepastian hukum jaminan; konversi ABSTRACTIn the second section of the UUPA regulates the conversion of land rights into a form of legal certainty as stipulated in Article 33 paragraph (3) of the 1945 Constitution. But the legal certainty of the conversion of the Right to western land, especially the Eigendom Verponding Rights certificate, remains a problem for people who have proof of ownership of the western land if it is used as a guarantee to obtain credit facilities. The research method used is normative juridical with the study of primary, secondary and tertiary legal materials. Based on the discussion that legal certainty related to the conversion of rights Eigendom Verponding has had a binding legal force with the necessary provisions of conversion so that it can be used as an object of guarantee but in practice there is still an object of guarantee by not taking into account the origin of the object of the guarantee and the legal consequences of the conversion of the right to land is the enactment of the UUPA being the basis that the principle of the status quo of the former land rights provides a guarantee of legal certainty with the provisions of old rights to be unclaimed civility. Keywords: conversion; guarantee legal certainty; land rights; western rights

scholarly journals Authorized Failure: How is Company Status?

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Fiany Alifia Lasnita ◽  
Muhamad Adji Rahardian Utama
Keyword(s):  
Limited Liability ◽  
Limited Liability Company ◽  
Legal Entity ◽  
Company Limited ◽  
Proof Of Ownership ◽  
Personal Wealth ◽  
A Company ◽  
A Share

The sense of the limited liability company is a legal entity to be able to run a business that has a capital consisting of a share, which its owners have lots of stock. Because it is composed of capital over shares that can be traded, and changes to the ownership of the company can be done without the need for a dissolution of a company. Limited liability company is a business entity and the magnitude of the capital company which are poured in a basic budget. The wealth of the company separate from the personal wealth of the owners of the company so that it can have its own treasures. Each person can have more than one stock which can be a proof of ownership of a company. The owner of the stock itself has a limited liability, i.e. as much as their shares. In the establishment of limited liability company also required permission and also some important documents that should be owned by a limited liability company to be its foundation.

scholarly journals Sukuk (Obligasi Syariah) dalam Perspektif Keuangan Islam

2019 ◽  
Vol 5 (2) ◽  
pp. 165-179
Author(s):  
Maula Nasrifah
Keyword(s):  
Financial Institutions ◽  
Capital Market ◽  
Revenue Sharing ◽  
Profit Sharing ◽  
Mutual Respect ◽  
For Profit ◽  
Private Placement ◽  
Proof Of Ownership ◽  
Maturity Date ◽  
The Future

Islam strongly encourages investment so that possessions can be productive and bring benefits in the future, of course, using a good and right way, which is in accordance with Islamic sharia, like mutual respect and does not harm others. The type of investment can be varied, we can invest through the capital market, one of which is sukuk. Sukuk are securities that are proof of ownership (claim) on assets, whether in the form of tangible, intangible or project contracts from certain activities that require the issuer to pay revenue-sharing to the Sukuk holders and pay back the Sukuk in maturity date. The principle in Sukuk transactions is in the form of emphasis on fair agreements, recommendations for profit sharing systems. In Sukuk transaction, a number of certain assets are needed which to used as the basis for conducting transactions using a contract based on sharia principles. The types of Sukuk in terms of Sukuk Ijarah, Sukuk Mudharabah, Sukuk Musyarakah, Sukuk Istishna’ with the method of issuing in bookbuilding, auction methods and private placement. In sukuk transactions there is a requirement for Underlying Assets as well as activities or processes which have been based in accordance with sharia. This shows that investing with sukuk is not worrying for investors who want to transact with sharia financial institutions. Keywords: Investing, Transaction, Sukuk

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