Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Emerging Applications of Information Technology

An improved certified email protocol using an offline TTP

Ranadeep Mukherjee, Ambar Dutta

Published Nov 1, 2012• 1 citation
Publisher

Abstract

Certified email allows two parties to exchange a message while providing each party an evidence to prove the involvement of the other party in the exchange. This paper proposes a new certified email protocol which aims to improve an existing popular protocol. It does so by using an offline TTP and implementing “no author selective receipt”.

DOI
10.1109/eait.2012.6407993

Related papers

Fair Certified Email Protocol

Abdullah Mohammed Alaraj

In this paper, a new fair certified email protocol is proposed. The proposed protocol uses offline trusted third party (TTP) that will only be involved if a party misbehaves, otherwise the TTP is inactive. The protocol is based on the verifiable and recoverable encryption of keys. In this regard, the recipient of an email will be able to verify if the encrypted key used to encrypt the email is correct. The protocol comprises of only three messages in the exchange sub-protocol and three messages in the recovery sub-protocol. The proposed protocol is more efficient compared with related protocols.

INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY•Jul 25, 2013•3 citations

Optimised Multi-Party Certified Email Protocols

Jianying Zhou, Jose Antonio Onieva, Javier López +2 more

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.

•Jan 1, 2005•9 citations

No Author Based Selective Receipt in an Efficient Certified E-mail Protocol

M. Magdalena Payeras–Capellà, Macià Mut–Puigserver, Josep Lluís Ferrer Gomila +1 more

A certified electronic mail protocol must avoid the selective receipt of messages in notification operations. No author based selective receipt is a desired feature for certified electronic mail protocols because the receiver must accept or reject the message before the identity of the sender is revealed. We present a certified e-mail protocol, based in our previous protocol presented in the International Security Workshop 2000, which avoids selective receipt. The modified protocol does not use the signature of the sender in the first step of the protocol and avoids temporally the identification of the sender. However, even without this signature, the protocol presents a dispute resolution system that avoids unfair situations. The result is a fair, asynchronous and efficient protocol. Moreover we have evaluated the role of the TTP in the fair exchange protocol, showing that the incorrect behavior of the TTP can be demonstrated in all cases, so the TTP is verifiable.

Euromicro International Conference on Parallel, Distributed and Network-Based Processing (PDP)•Feb 1, 2009•8 citations

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

Nicolás Gonzaléz-Deleito

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.

•May 9, 2005•6 citations

Generic, Optimistic, and Efficient Schemes for Fair Certified Email Delivery

Guilin Wang, Feng Bao, Kenji Imamoto +1 more

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.

•Jan 1, 2005•0 citations

Optimized multi‐party certified email protocols

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
Certified email allows two parties to exchange a message while providing each party an evidence to prove the involvement of the other party in the exchange. This paper proposes a new certified email protocol which aims to improve an existing popular protocol. It does so by using an offline TTP and implementing “no author selective receipt”.
In this paper, a new fair certified email protocol is proposed. The proposed protocol uses offline trusted third party (TTP) that will only be involved if a party misbehaves, otherwise the TTP is inactive. The protocol is based on the verifiable and recoverable encryption of keys. In this regard, the recipient of an email will be able to verify if the encrypted key used to encrypt the email is correct. The protocol comprises of only three messages in the exchange sub-protocol and three messages in the recovery sub-protocol. The proposed protocol is more efficient compared with related protocols.
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.
A certified electronic mail protocol must avoid the selective receipt of messages in notification operations. No author based selective receipt is a desired feature for certified electronic mail protocols because the receiver must accept or reject the message before the identity of the sender is revealed. We present a certified e-mail protocol, based in our previous protocol presented in the International Security Workshop 2000, which avoids selective receipt. The modified protocol does not use the signature of the sender in the first step of the protocol and avoids temporally the identification of the sender. However, even without this signature, the protocol presents a dispute resolution system that avoids unfair situations. The result is a fair, asynchronous and efficient protocol. Moreover we have evaluated the role of the TTP in the fair exchange protocol, showing that the incorrect behavior of the TTP can be demonstrated in all cases, so the TTP is verifiable.
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.
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.