Peer Review History

Original SubmissionJune 11, 2021
Decision Letter - Muhammad Khurram Khan, Editor

PONE-D-21-19203

An improved efficient anonymous authentication with conditional privacy-preserving scheme for VANETs

PLOS ONE

Dear Dr. Hwang,

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Muhammad Khurram Khan, Ph.D.

Academic Editor

PLOS ONE

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: N/A

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: The authors proposed an improved efficient anonymous authentication with conditional privacy-preserving scheme for VANETs. First, the authors pointed out that the Kazemi et al.’s scheme is vulnerable to some attacks. Second, they proposed an improvement to remedy these attacks. Check its correctness and analysis, it is correct and complete. The evaluation results shows that their scheme is better in terms of computation time consumption. The paper is well-written and well-organization. However, some suggestions should be addressed if the paper is accepted.

1. Several grammar mistakes of English exist in this paper, which need to be carefully checked and revised.

2. The format of your paper is wrong. Please check your format for this journal using their templet.

3. Please cite the following related important papers in this area.

a) DOI: 10.1109/IVS.2015.7225898

b) https://doi.org/10.1007/s11276-013-0543-7

Reviewer #2: In this paper authors performed cryptanalysis of a previously published paper. Authors figured Kazemi et al.’s scheme suffered from the un-linkability issue that leads to a forgery attack. An adversary can link two or more messages sent by the same user by applying Euclid’s algorithm and derives the user’s authentication key. To address this problem, authors encrypt the message using a shared secret key between sender and receiver and apply a Nonce in the final message to guarantee

the un-linkability between disseminated messages.

The work is interesting, but there are some concerns which should be addressed for the next round of review:

1. I think, there is a room to improve the English of this paper. I suggest authors to completely proof-read this paper to improve its readability.

2. I found there are two relevant schemes in VANETs authentication which have been overlooked by authors and should be discussed in the introduction and if possible should be compared with:

https://ieeexplore.ieee.org/abstract/document/6576161

https://ieeexplore.ieee.org/abstract/document/7047920

These two papers are seminal in ID-based verification of VANETs and could be discussed in the introduction section also to give a clear background of the research work.

3. The digital authentication field has revolutionized during the last 2 decades and there are so many new innovations by using cloud and biometrics authentication. I suggest authors to discuss how privacy, cloud and biometrics have impacted the authentication field and what benefits it has brought to the automotive industry for VANETs. There are some following papers which could give a good background of it and can be discussed in the revision:

https://www.sciencedirect.com/science/article/abs/pii/S1084804512001890

https://www.sciencedirect.com/science/article/abs/pii/S1084804518301309

https://www.tandfonline.com/doi/abs/10.4103/0256-4602.50703

4. Its better to improve and revise the conclusion section of this paper.

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Reviewer #1: No

Reviewer #2: No

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Revision 1

Reviewer 1: Comments to the Author

Several grammar mistakes of English exist in this paper, which need to be carefully checked and revised.

Authors’ reply:

Thanks for the referee’s comment. We have checked and revised some grammatical errors in our manuscript. In addition, we have tried our best to proofread it.

The format of your paper is wrong. Please check your format for this journal using their template.

Authors’ reply:

Thanks for the referee’s comment. We use the template from the PLOS ONE journal’s website for our manuscript. https://journals.plos.org/plosone/s/latex.

Please cite the following related important papers in this area.

a) DOI: 10.1109/IVS.2015.7225898

b) https://doi.org/10.1007/s11276-013-0543-7

Authors’ reply:

Thanks for the referee’s comment. Yes, we have included both “https://doi.org/10.1109/IVS.2015.7225898” and “https://doi.org/10.1007/s11276-013-0543-7” on the Introduction section and References [23] and [25]. We categorized the first article as a symmetric cryptography-based authentication scheme. Meanwhile, the other one is included as the ID-based signature scheme.

Reviewer 2: Comments to the Author

I think, there is a room to improve the English of this paper. I suggest authors to completely proof-read this paper to improve its readability.

Authors’ reply:

Thanks for the referee’s comment. We have checked and revised some grammatical errors in our manuscript. In addition, we have tried our best to proofread it.

I found there are two relevant schemes in VANETs authentication which have been overlooked by authors and should be discussed in the introduction and if possible should be compared with:

https://ieeexplore.ieee.org/abstract/document/6576161

https://ieeexplore.ieee.org/abstract/document/7047920

These two papers are seminal in ID-based verification of VANETs and could be discussed in the introduction section also to give a clear background of the research work.

Authors’ reply:

Thanks for the referee’s comment. Both papers you suggested above are important, and we also added them in References [26] and [28]. We have included both suggested articles in the Introduction section and compare them in the Security Analysis and Performance Analysis sections. In the Introduction section, both articles included an ID-based signature scheme.

The digital authentication field has revolutionized during the last 2 decades and there are so many new innovations by using cloud and biometrics authentication. I suggest authors to discuss how privacy, cloud and biometrics have impacted the authentication field and what benefits it has brought to the automotive industry for VANETs. There are some following papers which could give a good background of it and can be discussed in the revision:

https://www.sciencedirect.com/science/article/abs/pii/S1084804512001890

https://www.sciencedirect.com/science/article/abs/pii/S1084804518301309

https://www.tandfonline.com/doi/abs/10.4103/0256-4602.50703

Authors’ reply:

Thanks for the referee's comment. Yes, we have discussed the above-suggested papers in the second and third paragraphs (Page 2) of the Introduction section. We have added references in [11], [13], and [15].

Its better to improve and revise the conclusion section of this paper.

Authors’ reply:

Thanks for the referee’s comment. We have rewritten the Conclusion section.

Previous version:

“This article has shown that Kazemi et al.’s scheme does not provide unlinkability and suffers from a forgery attack that leads to an impersonation attack. The adversary can obtain the secret parameter 〖AK〗_(u_i ) through Euclid’s algorithm by linking two or more messages msg sent by the same user u_i. To overcome these drawbacks, we have proposed our improvements to security vulnerabilities by giving the scheme an immunity to unlinkability impendency, leading to forgery and impersonation attacks.”

Revised version:

“In this paper, we proposed an improvement towards Kazemi et al.’s authentication scheme. Our investigation exhibited that an adversary A can derive the user’s secret parameter 〖AK〗_(u_i ) through Euclid’s algorithm property. Thus, it does not provide traceability and unlinkability, which leads to impersonation attacks. Since introducing two types of improvements, whether encrypts the message M with a shared secret key sk between sender and receiver or put a Nonce in the final message msg, we have proposed improving this scheme and making it secure.”

Acknowledgement

The authors would like to thank the anonymous referee for their valuable discussions and comments.

Attachments
Attachment
Submitted filename: LIST_OF_REVISIONS_PONE-D-21-19203-Hwang.pdf
Decision Letter - Muhammad Khurram Khan, Editor

An improved efficient anonymous authentication with conditional privacy-preserving scheme for VANETs

PONE-D-21-19203R1

Dear Dr. Hwang,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Muhammad Khurram Khan, Ph.D.

Academic Editor

PLOS ONE

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: (No Response)

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: (No Response)

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: (No Response)

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4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: (No Response)

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: (No Response)

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6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: (No Response)

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: No

Formally Accepted
Acceptance Letter - Muhammad Khurram Khan, Editor

PONE-D-21-19203R1

An improved efficient anonymous authentication with conditional privacy-preserving scheme for VANETs

Dear Dr. Hwang:

I'm pleased to inform you that your manuscript has been deemed suitable for publication in PLOS ONE. Congratulations! Your manuscript is now with our production department.

If your institution or institutions have a press office, please let them know about your upcoming paper now to help maximize its impact. If they'll be preparing press materials, please inform our press team within the next 48 hours. Your manuscript will remain under strict press embargo until 2 pm Eastern Time on the date of publication. For more information please contact onepress@plos.org.

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Thank you for submitting your work to PLOS ONE and supporting open access.

Kind regards,

PLOS ONE Editorial Office Staff

on behalf of

Prof. Muhammad Khurram Khan

Academic Editor

PLOS ONE

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