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No Author-Based Selective Receipt in Certified Email with Tight Trust Requirements

Nicolás Gonzaléz-Deleito

Published May 9, 2005• 6 citations
OpenAlex

Abstract

Kremer and Markowitch introduced in [10] a new property for certified email protocols called no author-based selective receipt, and proposed two new protocols respecting it. In this paper we show that these protocols implicitly require the sender of the email to trust the trusted third party to assure this property. We propose a new protocol in which this trusted third party has only to be trusted to assure fairness and timeliness, like in most other exchange protocols. Unfortunately, unlike [10], our protocol does not guarantee the delivery of a non-repudiation of origin evidence to the recipient. We prove that this is impossible to achieve without a fully trusted third party.

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Jianying Zhou, Jose Antonio Onieva, Javier López

Purpose As a value‐added service to deliver important data over the internet with guaranteed receipt for each successful delivery, certified email has been discussed for years and a number of research papers appeared in the literature. This paper aims to present two optimized multi‐party certified email protocols. Design/methodology/approach Reviews two existing email protocols and provides a modified version to overcome their security flaws and weaknesses. Extends the two‐party protocol to a multi‐party scenario. Findings Both of the protocols have three major features. A sender could notify multiple recipients of the same information while only those recipients who acknowledged are able to get the information. Both the sender and the recipients can end a protocol run at any time without breach of fairness. The exchange protocols are optimized, each of which has only three steps, and the trusted third party will not be involved unless an exception (e.g. a network failure or a party's misbehavior) occurs. Originality/value Provides a focus on a value‐added service – certified email.

Information Management & Computer Security•Dec 1, 2005•13 citations
Kremer and Markowitch introduced in [10] a new property for certified email protocols called no author-based selective receipt, and proposed two new protocols respecting it. In this paper we show that these protocols implicitly require the sender of the email to trust the trusted third party to assure this property. We propose a new protocol in which this trusted third party has only to be trusted to assure fairness and timeliness, like in most other exchange protocols. Unfortunately, unlike [10], our protocol does not guarantee the delivery of a non-repudiation of origin evidence to the recipient. We prove that this is impossible to achieve without a fully trusted third party.
This paper presents an efficient security protocol for certified e-goods delivery with the following features: (1) ensures strong fairness, (2) ensures non-repudiation of origin and non-repudiation of receipt, (3) allows the receiver of an e-goods to verify, during the protocol execution, that the e-goods he is about to receive is the one he is signing the receipt for, (4) does not require the active involvement of a fully trusted third party, but rather an off-line and transparent semi-trusted third party (STTP) only in cases of unfair behaviour by any party, and (5) provides confidentiality protection for the exchanged items from the STTP.
Electronic mail delivery is one of the most important and desirable services, by which the intended recipient will get the mail if and only if the mail originator receives a valid and irrefutable proof of the receipt. The idea of conditional trusted third party has been developed on the basis of semi-trusted TTP and a suite of acceptable conditions is given. A new practical protocol for certified e-mail is presented, which can guarantee acceptable fair with interception of conditional TTP. More, the evidence in the new protocol is publicly verifiable without any restrictions on the type of signature and encryption algorithms.
As a value-added service to deliver important data over the Internet with guaranteed receipt for each successful delivery, certified email has been discussed for years and a number of research papers appeared in the literature. But most of them deal with the two-party scenarios, i.e., there are only one sender and one recipient. In some ap- plications, however, the same certified message may need to be sent to a set of recipients. In this paper, we present two optimized multi-party certified email protocols. Both of them have three major features. (1) A sender could notify multiple recipients of the same information while only those recipients who acknowledged are able to get the information. (2) Both the sender and the recipients can end a protocol run at any time without breach of fairness. (3) The exchange protocols are optimized, each of which has only three steps, and the TTP will not be involved unless an exception (e.g., a network failure or a party's misbehavior) occurs.
Abstract. As a value-added service for standard email systems, a certified email scheme allows a sender to deliver a message to a receiver in a fair way in the sense that either the sender obtains a receipt from the receiver and the receiver accesses the content of the email simultaneously, or neither party gets the expected item. In this paper, we first point out some weaknesses in several existing schemes. Then, we present two generic optimistic certified email schemes with transparent TTP. Our schemes are not only fair, but also support timeliness in two flavors: one scheme supports weak timeliness but with stateless TTP, while the other guarantees (strong) timeliness though only supports weak stateless TTP. Technical discussion and comparison are provide to show that our schemes are both secure and efficient, compared with the-state-of-art in this field.
Purpose As a value‐added service to deliver important data over the internet with guaranteed receipt for each successful delivery, certified email has been discussed for years and a number of research papers appeared in the literature. This paper aims to present two optimized multi‐party certified email protocols. Design/methodology/approach Reviews two existing email protocols and provides a modified version to overcome their security flaws and weaknesses. Extends the two‐party protocol to a multi‐party scenario. Findings Both of the protocols have three major features. A sender could notify multiple recipients of the same information while only those recipients who acknowledged are able to get the information. Both the sender and the recipients can end a protocol run at any time without breach of fairness. The exchange protocols are optimized, each of which has only three steps, and the trusted third party will not be involved unless an exception (e.g. a network failure or a party's misbehavior) occurs. Originality/value Provides a focus on a value‐added service – certified email.