An Area-Optimized and Power-Efficient CBC-PRESENT and HMAC-PHOTON

Round 1

Reviewer 1 Report

The paper presents an efficient method for CBC-PRESENT and HMAC-PHOTON with 128-bit plaintext and 128-bit key by applying a feedback path in hardware structures to promote resource reuse. The paper is well organized and results are clearly presented. The proposed cryptography structures can be applied to information security SoC such as constrained IoT devices demanding small area and low power consumption. It would be good if the authors of the article make a detailed study of sweets in the field and systematize them in a separate section. There are also no prospects for the development of the work.

Author Response

We greatly appreciate the reviewers' time and efforts to review the manuscript. The reviewers' comments have been invaluable to improve the presentation and the quality of the revised manuscript. We carefully considered the reviewers' comments, and their suggestions have been adopted in the revised manuscript. We believe that the revised manuscript. Is much easier to follow and its technical contributions are easier to understand. In the following, we describe our responses to the reviewer’s comments.

Author Response File: Author Response.pdf

Reviewer 2 Report

The MATLAB simulation test involved in the paper should be more detailed, such as supplementing the description of relevant figures and tables.

Author Response

We greatly appreciate the reviewers' time and efforts to review the manuscript. The reviewers' comments have been invaluable to improve the presentation and the quality of the revised manuscript. We carefully considered the reviewers' comments, and their suggestions have been adopted in the revised manuscript. We believe that the revised manuscript. Is much easier to follow and its technical contributions are easier to understand. In the following, we describe our responses to the reviewer’s comments.

Author Response File: Author Response.pdf

Reviewer 3 Report

This paper introduces an area-optimized and power-efficient implementation of Cipher 1 Block Chaining (CBC) mode for an ultra-lightweight block cipher, PRESENT, and the Keyed-Hash 2 Message Authentication Code (HMAC) expanded PHOTON, by using a feedback path for a single 3 block in the scheme. An experimental analysis and comparison between a 5 conventional implementation of CBC-PRESENT/HMAC-PHOTON with the proposed feedback- 6 based is performed. The proposed CBC-PRESENT/HMAC-PHOTON with 128-bit plaintext/text 7 and 128-bit secret key have a gate count of 5683/20698 and low power consumption of 1.03/2.62 mW, 8 with a throughput of 182.9/14.9 Mbps at the maximum clock frequency of 100 MHz, respectively. The work is interesting, but some issues must be answered carefully.

1. Why CBC encryption and decryption is selected, while there exist various kinds of modes of operations?

2. What is the advantages of the proposed model?

3. Can the encryption and decryption methodology be broken with a cryptanalyst? How to avoid that?

4. Figure 13, 14, and 15 are not clear enough. Please try to enhance their quality?

5. Can the authors compare their work with other studies relevant to the same problem?

Author Response

We greatly appreciate the reviewers' time and efforts to review the manuscript. The reviewers' comments have been invaluable to improve the presentation and the quality of the revised manuscript. We carefully considered the reviewers' comments, and their suggestions have been adopted in the revised manuscript. We believe that the revised manuscript. Is much easier to follow and its technical contributions are easier to understand. In the following, we describe our responses to the reviewer’s comments.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The paper can be published in present form

Reviewer 3 Report

IT IS SUITALBE FOR PUBLICATION IN THE ELECTRONICS MDPI JOURNAL.