Escrow System Research Articles

Retraction Note: Enhanced post-quantum key escrow system for supervised data conflict of interest based on consortium blockchain

Retraction Note: Enhanced post-quantum key escrow system for supervised data conflict of interest based on consortium blockchain

Enhanced post-quantum key escrow system for supervised data conflict of interest based on consortium blockchain.

Consortium blockchains offer privacy for members while allowing supervision peers access to on-chain data under certain circumstances. However, current key escrow schemes rely on vulnerable traditional asymmetric encryption/decryption algorithms. To address this issue, we have designed and implemented an enhanced post-quantum key escrow system for consortium blockchains. Our system integrates NIST post-quantum public-key encryption/KEM algorithms and various post-quantum cryptographic tools to provide a fine-grained, single-point-of-dishonest-resistant, collusion-proof and privacy-preserving solution. We also offer chaincodes, related APIs, and invoking command lines for development. Finally, we perform detailed security analysis and performance evaluation, including the consumed time of chaincode execution and the needed on-chain storage space, and we also highlight the security and performance of related post-quantum KEM algorithms on consortium blockchain.

디지털 정부혁신을 위한 부동산에스크로시스템도입에 관한 연구

Korea integrated 18 kinds of real estate transaction-related certificates into one by spending big budgets over the years. Notwithstanding this effort, the online certificate developed by the government is only used as a reference for transactions. Meanwhile, taxes are evaded along with manipulated real transactions and total transaction services are not properly provided, since there are many parties to transactions. This is why there is a backward country type of real estate transaction that brings about various ill effects including real estate transaction incidents. Besides, covert transactions prevail due to veiled transaction amounts and this makes it impossible to impose a tax at a real transaction price. In order to settle problems of the existing real estate brokerage system, there is a need to improve the current simple agency-based brokerage system consisting of many subdivided domains, develop a system for transparent announcement of real transaction prices and change into a real estate escrow system that enables the government to see transaction funds at once. Above all, it is urgently needed to introduce an escrow system, which is an advanced country type of real estate service system to guarantee safe transactions 100% when real estate transaction incidents occur. It is anticipated that development of real estate escrow system will make a contribution to stabilization of real estate transactions by 1) making the domestic real estate transaction system transparent, 2) establishing real transaction prices and consequently, expanding revenues, 3) facilitating stable management of real estate transaction funds, 4) integrating real estate transactions, 5) protecting consumers and improving the compensation system for damages, 6) reducing diverse opportunity costs and transaction costs through online services and 7) upgrading the credit rating for Mortgage Backed Security(MBS) when overseas real estate is open.

A Study on Introducing Escrow Payment Method for Small and Medium-sized Export Enterprises

본 연구에서는 수출중소기업이 어려움을 겪고 있는 수출대금 결제방식의 문제를 기존의 거래방식의 문제점을 분석하여 전자결제를 통해 대응방법을 제시하고자 하였다. 정보통신의 발달과 금융환경의 변화에 따라 무역환경은 빠른속도로 변화하고 있다. 기존 전자무역 결제방식은 B2B거래에 많이 사용되어가는 추세이지만, 중소기업에서 실질적으로 사용할 수 있는 시스템은 많지 않다. 또한 최근 무역결제방식의 추세 역시 무신용장방식으로 변화되면서 수출중소기업의 대금결제 사고 비율도 늘어나고 있으며 이에 대한 대응책이 필요한 시점이다. 본 연구에서는 수출중소기업의 현황과 기존 전자무역 결제방식의 장단점을 분석하고, 저비용, 거래당사자의 편의성을 확대할 수 있는 방법으로 B2C거래에 까지 활용할 수 있는 에스크로제도의 도입 필요성과 거래당사자의 활용방안에 대해 제시하였다.Under this study, it is intended to present responsive method through the electronic payment on issues of export proceeds payment method where small and medium-sized export enterprises encounter with significant difficulty by analyzing the issues of existing transaction method. Following the development of information communication and change of financial environment, the trade environment is swiftly changing. Existing e-commerce payment method is significantly used in the B2B transactions now, but there are not many systems to actually use for small and medium-sized enterprises. In addition, the recent trend of trade payment method frequently facilitate the non-letter of credit method that the ratio of proceeds payment troubles for those small and medium-sized export enterprises is on the rise. Under this study, the strengths and weaknesses of the status of small and medium-sized export enterprises and existing e-commerce payment method are analyzed and the need of introducing the escrow system that may be facilitated at low cost and for B2C transaction as well as its operation plan are proposed.

An Analysis of the Escrow System of Payment Settlement in South-North Korean Trade

Despite the continuing expansion of volume in South-North Korean trade, trade problems occur due to inadequate mutual payment settlement systems. This study focuses on payment settlement method of South-North Korea trade and types of payment settlement and payment settlement measures in South-North Korean Trade. Considering the current South-North Korean relationship, measures for the adoption of the trade escrow system as an effective means of payment settlement were examined. Related example and measures for applying the systems to South-North Korean trade were analyzed. Under the proposed measure, a public agency, which has public reliability and professionalism regarding South-North trade, should be selected as an escrow agent. Also, the agent should, in alliance with financial institutions, undertake to manage deposits in safe. The government designated escrow agent should conclude an escrow agreement with trust institutions for settlement of payment, and undertake the work of deposit and remittance of trade payment. The proposed escrow system is expected to reduce trade risks for South-North trading firms, and to effectively monitor the flow of payment settlement, thereby enhancing the transparency of trade.

SMEs Foreign Construction Business Supporting Plan by Improvement of Surety Bond Issuance focusing on the Adoption of Escrow System

SMEs Foreign Construction Business Supporting Plan by Improvement of Surety Bond Issuance focusing on the Adoption of Escrow System

A Study on the Scheme to Revitalize the Escrow through the Stabilization of Real Estate Transactions

Entering the era of globalization, international real estate companies to advance into the country are increasing. And real estate transactions, the need for transparency and reliability are becoming even more. The alternative that real estate transactions in advance to avoid an accident is just an escrow system. Analysing the status and actual conditions of escrow in the country's real estate market and presenting the activation plans are as follows. First, the government should support building bulk service for real estate transactions. Second, tax benefits should be developed.

부동산 이중매매와 그 예방

The Korean real estate transaction makes a contract after the buying and selling person concerned agreed a business condition. As for vendee, business consists of the method that I issue documents before provision and money left over provision and the registration at the same time, and register a contract deposit in vendor. However, it latent for the real estate transaction various accidents such as fraud from a contract day to time to finish a real estate registration transfer, embezzlement, double contract by the breach of trust. Nevertheless vendee comes to match vendor by an asymmetry of the information one-sidedly to the front completing a registration transfer. I may prevent stellionate by the breach of trust of vendor if I use an ESCROW system in such a responsibility blank state.

Scalable Key-Escrow

We propose a cryptosystem that has an inherent key escrow mechanism. This leads us to propose a session based public verifiable key escrow system that greatly improves the amount of key material the escrow servers have to keep in order to decrypt an encryption. In our scheme the servers will only have a single secret sharing, as opposed to a single key from every escrowed player. This is done while still having the properties: 1) public verifiable: the user proves to everyone that the encryption can indeed be escrowed, and 2) no secret leakage: no matter how many decryptions a law enforcement agency is presented, it will gain no more information on the users private key, than it couldn't have calculated itself.

On the key escrow system without key exchange

The key escrow system bridges the gap between privacy and protection against criminal behavior. In this paper, we propose a new key escrow system (NKES) and a partial key escrow system (PKES). Both of the systems have the advantages such as the users need not to perform key exchange beforehand, the sender always generates a true law enforcement access field whenever the information is encrypted, and law enforcement access field cannot be successfully forged. Beside these advantages, the partial key escrow system has delay recovery property, which is essential for user's privacy.

A public-key-based key escrow system

A key escrow system allows devices such as telephones or computers to communicate securely, while permitting a monitor such as a law enforcement agency to access encrypted communications under prescribed conditions. The U.S. government has created an escrow system using secret-key cryptography and classified algorithms, implementable in hardware only. We describe an alternative escrow system that uses public-key cryptography and nonclassified algorithms, implementable in hardware or software. The new system should give users (and perhaps governments) more confidence, be more exportable, and permit a fully automated escrow/retrieval system.

Pretty good encryption

The use of codes and other methods of concealing the contents of messages is as old as recorded information. With the advent of computer communication, the need for a method of ensuring secure communication over insecure channels, such as the Internet, has seen an increased demand for good cryptography. However, the recent avail ability of public domain public-key encryption software, such as Philip R. Zimmermann's Pretty Good Privacy (PGP), has been described as 'letting the cryptographic genie out of the bottle', and has raised issues of national communication policy and personal privacy. In the USA, the government's Clipper encryption chip initiative sought to implement a key escrow system which would enable law enforcement agencies to wiretap all digital communi cation. Civil liberty opponents of key escrow systems argue that they will not affect criminals, and fear that they can only be made effective by banning the use of alternative encryption systems, such as PGP. Methods for obtaining and using PGP to encrypt and decrypt e-mail messages are described.

Key escrowing today

The objective of the US Government's Escrowed Encryption Standard (EES) and associated Key Escrow System (KES) is to provide strong security for communications while simultaneously allowing authorized government access to particular communications for law enforcement and national security purposes. The article describes the EES and the KES. Particular emphasis is given to security, since potential users have been concerned that the hooks which provide authorized government access could be exploited or abused. It describes many of the safeguards that have gone into the design of the KES in order to ensure that the risk of unauthorized access to EES-encrypted communications is negligible.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Micro view. Clipper: soon a de facto standard?

Despite assurances to the contrary, the US government may put its buying power and political muscle into making a de facto commercial standard of the Clipper chip. As a hardware device implanted in telephones, Clipper and its associated key escrow system are designed to ensure the security of electronic communications against private adversaries, while also providing law enforcement and national security agencies with master keys for intercepting and decoding messages.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Deadlock prediction for Escrow transactions

The Escrow transactional method permits long-lived transactions to update records without blocking concurrent access by other transactions to records modified. A situation may occur in an Escrow system in which an update request cannot currently be granted, but if the requesting transaction is allowed to wait, the resulting situation is safe in the sense of the banker's algorithm, i.e. a schedule to grant requests exists whereby all current requests can be granted. Any algorithm to find such a schedule must predict potential deadlocks, and we show that this problem is NP-complete, using a variant of a proof by Gold. The proof draws an analogy between transactional deadlock prediction and the banker's algorithm, and thus is of independent interest. In the conclusions of Section 5 we point out some basic negative performance ramifications of deadlock avoidance/detection inherent in the standard approach of the banker's algorithm; this suggests an avenue for further research.