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Journal of Zhejiang University(Engineering Science)

An efficient dynamic group key agreement protocol

YE Cheng-qing

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

A new efficient dynamic group key agreement protocol was presented to reduce the communication cost in ID-based constant round authenticated group key agreement.All group members constructed a ring structure during the group key agreement.Utilizing the technology proposed in one round tripartite key agreement protocol,about half of group members did not need to broadcast their messages in the second round information exchange in this protocol.So the efficiency of this protocol was improved.Then the group key agreement protocol was extended to suit dynamic group membership.When the membership changed,the number of members participating in the message exchange was only dependent on the number of joining/leaving numbers instead of that of all members.Hence,the total communication cost in the protocol was reduced compared with other protocols.Analysis results show that it is a secure protocol and more efficient than other protocols.

Related papers

1-round dynamic group key agreement

YE Cheng-qing

Among the conventional round group key agreement protocol,the minimal number of message exchange round is 2.The efficiency of the protocol is affected by the number of message exchange round.Using a secret shared technology that two parties share a common static secret without any interaction between them,an efficient one-round ID-based authenticated group key agreement scheme was proposed and extended to the dynamic group.The number of message exchanged during the key agreement in this one-round protocol is reduced to half of that in two-round protocols.So the efficiency of its communication is improved.The proposed scheme was proved to be secure and be forward and backward secure,and can be applied to the secure group communication where the perfect forward secure is not needed.

Journal of Zhejiang University(Engineering Science)•Jan 1, 2007•0 citations

Round-optimal ID-based dynamic authenticated group key agreement

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A group key agreement protocol provides a set of users with a shared secret key to achieve cryptographic goal. When membership changes, group session key should be updated efficiently and securely. Hence, dynamic group key agreement protocols are of practical significance. Identity-based group key agreement protocols are preferred to certificate-based ones since identity-based protocols can simplify public key management procedure. Most of previous dynamic group key agreement protocols need at least two rounds to establish or refresh group session keys. In this paper, an identity-based dynamic authenticated group key agreement (DAGKA) protocol is presented. It is round-optimal, since: 1) in setup and join algorithms, only one round of communication is required; 2) in leave algorithm, there is no message exchange among group members. Joining members cannot compute previous session keys and leaving members cannot compute subsequent session keys. The protocol is provably secure. Its AKE-security is proved under decisional bilinear Diffie-Hellman (DBDH) assumption. In addition, the protocol resists key control attack and achieves forward security.

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Round-optimal ID-based dynamic authenticated group key agreement

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A group key agreement protocol provides a set of users with a shared secret key to achieve cryptographic goal. When membership changes, group session key should be updated efficiently and securely. Hence, dynamic group key agreement protocols are of practical significance. Identity-based group key agreement protocols are preferred to certificate-based ones since identity-based protocols can simplify public key management procedure. Most of previous dynamic group key agreement protocols need at least two rounds to establish or refresh group session keys. In this paper, an identity-based dynamic authenticated group key agreement (DAGKA) protocol is presented. It is round-optimal, since: 1) in setup and join algorithms, only one round of communication is required; 2) in leave algorithm, there is no message exchange among group members. Joining members cannot compute previous session keys and leaving members cannot compute subsequent session keys. The protocol is provably secure. Its AKE-security is proved under decisional bilinear Diffie-Hellman (DBDH) assumption. In addition, the protocol resists key control attack and achieves forward security.

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Efficient ID-Based Two Round Authenticated Group Key Agreement Protocol

Hong Jun Tang, Liehuang Zhu, Zijian Zhang

Group key agreement protocol allows all the members to agree upon a common session key, which may be used for later secure communication among all the participants. Through incorporating ID-based authenticated two-party key agreement protocol proposed by McCullagh et al. and constant round group key agreement proposed by Burmester and Desmedt, we propose a new ID-based two round authenticated group key agreement protocol which is more efficient than previously proposed protocols in terms of both communication and computation cost.

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This paper presents an identity-based dynamic authenticated group key agreement (DAGKA) protocol with following advantages. The algorithms of Setup and Join has only one round communication. There is no message exchange among members in Leave algorithm. Joining members cannot know previous session keys and leaving members cannot know future session keys. Its AKE-security is proved under Decisional Bilinear Diffie-Hellman (DBDH) assumption. The protocol can resist key control attack and has forward security.

... International Conference on Complex, Intelligent and Software Intensive Systems•Jul 1, 2016•4 citations

Improvement of an Efficient Identity-Based Group Key Agreement Protocol

Wei Yuan, Liang Qing Hu, Kuo Zhao +3 more

In 2009, Zeng Ping et al. proposed a new Group Key Agreement protocol Based on the ID-AGKA protocol which uses full binary tree structure and each tree node represents a user. Their protocol support users to join or leave the group at any time and the session key will be changed with the users' dynamic changes. In this paper, we point out that Zeng Ping et al.'s Group Key Agreement protocol is non-authenticated and easy to be forged or modified. Then we give a method that attacker can force all group members accepted the modified session private key in BR security model. So, It means that the Zeng Ping et al.'s Protocol can not meet the attribute of implicit key authentication and key control. Finally, we propose an improved protocol to overcome this problem.

International Conference on Network Computing and Information Security•May 1, 2011•3 citations
A new efficient dynamic group key agreement protocol was presented to reduce the communication cost in ID-based constant round authenticated group key agreement.All group members constructed a ring structure during the group key agreement.Utilizing the technology proposed in one round tripartite key agreement protocol,about half of group members did not need to broadcast their messages in the second round information exchange in this protocol.So the efficiency of this protocol was improved.Then the group key agreement protocol was extended to suit dynamic group membership.When the membership changed,the number of members participating in the message exchange was only dependent on the number of joining/leaving numbers instead of that of all members.Hence,the total communication cost in the protocol was reduced compared with other protocols.Analysis results show that it is a secure protocol and more efficient than other protocols.
Among the conventional round group key agreement protocol,the minimal number of message exchange round is 2.The efficiency of the protocol is affected by the number of message exchange round.Using a secret shared technology that two parties share a common static secret without any interaction between them,an efficient one-round ID-based authenticated group key agreement scheme was proposed and extended to the dynamic group.The number of message exchanged during the key agreement in this one-round protocol is reduced to half of that in two-round protocols.So the efficiency of its communication is improved.The proposed scheme was proved to be secure and be forward and backward secure,and can be applied to the secure group communication where the perfect forward secure is not needed.
A group key agreement protocol provides a set of users with a shared secret key to achieve cryptographic goal. When membership changes, group session key should be updated efficiently and securely. Hence, dynamic group key agreement protocols are of practical significance. Identity-based group key agreement protocols are preferred to certificate-based ones since identity-based protocols can simplify public key management procedure. Most of previous dynamic group key agreement protocols need at least two rounds to establish or refresh group session keys. In this paper, an identity-based dynamic authenticated group key agreement (DAGKA) protocol is presented. It is round-optimal, since: 1) in setup and join algorithms, only one round of communication is required; 2) in leave algorithm, there is no message exchange among group members. Joining members cannot compute previous session keys and leaving members cannot compute subsequent session keys. The protocol is provably secure. Its AKE-security is proved under decisional bilinear Diffie-Hellman (DBDH) assumption. In addition, the protocol resists key control attack and achieves forward security.
A group key agreement protocol provides a set of users with a shared secret key to achieve cryptographic goal. When membership changes, group session key should be updated efficiently and securely. Hence, dynamic group key agreement protocols are of practical significance. Identity-based group key agreement protocols are preferred to certificate-based ones since identity-based protocols can simplify public key management procedure. Most of previous dynamic group key agreement protocols need at least two rounds to establish or refresh group session keys. In this paper, an identity-based dynamic authenticated group key agreement (DAGKA) protocol is presented. It is round-optimal, since: 1) in setup and join algorithms, only one round of communication is required; 2) in leave algorithm, there is no message exchange among group members. Joining members cannot compute previous session keys and leaving members cannot compute subsequent session keys. The protocol is provably secure. Its AKE-security is proved under decisional bilinear Diffie-Hellman (DBDH) assumption. In addition, the protocol resists key control attack and achieves forward security.
Group key agreement protocol allows all the members to agree upon a common session key, which may be used for later secure communication among all the participants. Through incorporating ID-based authenticated two-party key agreement protocol proposed by McCullagh et al. and constant round group key agreement proposed by Burmester and Desmedt, we propose a new ID-based two round authenticated group key agreement protocol which is more efficient than previously proposed protocols in terms of both communication and computation cost.
This paper presents an identity-based dynamic authenticated group key agreement (DAGKA) protocol with following advantages. The algorithms of Setup and Join has only one round communication. There is no message exchange among members in Leave algorithm. Joining members cannot know previous session keys and leaving members cannot know future session keys. Its AKE-security is proved under Decisional Bilinear Diffie-Hellman (DBDH) assumption. The protocol can resist key control attack and has forward security.
In 2009, Zeng Ping et al. proposed a new Group Key Agreement protocol Based on the ID-AGKA protocol which uses full binary tree structure and each tree node represents a user. Their protocol support users to join or leave the group at any time and the session key will be changed with the users' dynamic changes. In this paper, we point out that Zeng Ping et al.'s Group Key Agreement protocol is non-authenticated and easy to be forged or modified. Then we give a method that attacker can force all group members accepted the modified session private key in BR security model. So, It means that the Zeng Ping et al.'s Protocol can not meet the attribute of implicit key authentication and key control. Finally, we propose an improved protocol to overcome this problem.