A Novel Approach of Symmetric Key Cryptography

Author(s):  
Sanjeev Kumar ◽  
Madhu Sharma Gaur ◽  
Prem Sagar Sharma ◽  
Deepkiran Munjal
2019 ◽  
Vol 8 (3) ◽  
pp. 3679-3685

Symmetric-key cryptography is a classical cryptography in which both sender and receiver use the same key K to encrypt and decrypt the message. The main challenge between sender and receiver is to agree upon the secret-key which should not be revealed to public. Key management is the major issue in symmetric-key cryptosystem. To avoid these, a novel approach in generating the keystream Ks for any symmetric-key algorithms using U-matrix is proposed in this paper. The advantage of this method is generation of key K from Ks is based on some deterministic procedure which is then applied to DES algorithm and K is not necessarily remembered by both sender and receiver. Further, in each round different key is used as opposed to usage of single key in classical DES. Experimental results clearly show the security is increased when it is compared with classical DES.


Cryptography ◽  
2020 ◽  
pp. 193-213
Author(s):  
Srinivasa K. G. ◽  
Siddesh G. M. ◽  
Srinidhi Hiriyannaiah ◽  
Anusha Morappanavar ◽  
Anurag Banerjee

The world of digital communication consists of various applications which uses internet as the backbone for communication. These applications consist of data related to the users of the application, which is confidential and integrity needs to be maintained to protect against unauthorized access and use. In the information hiding field of research, Cryptography is one of the wide techniques used to provide security to the internet applications that overcome the challenges like confidentiality, integrity, authentication services etc. In this paper, we present a novel approach on symmetric key cryptography technique using genetic algorithm that is implemented on CUDA architecture.


Author(s):  
Srinivasa K. G. ◽  
Siddesh G. M. ◽  
Srinidhi Hiriyannaiah ◽  
Anusha Morappanavar ◽  
Anurag Banerjee

The world of digital communication consists of various applications which uses internet as the backbone for communication. These applications consist of data related to the users of the application, which is confidential and integrity needs to be maintained to protect against unauthorized access and use. In the information hiding field of research, Cryptography is one of the wide techniques used to provide security to the internet applications that overcome the challenges like confidentiality, integrity, authentication services etc. In this paper, we present a novel approach on symmetric key cryptography technique using genetic algorithm that is implemented on CUDA architecture.


2019 ◽  
Author(s):  
Ira Nath ◽  
Renesha Ghosh ◽  
Sourav Ghosh ◽  
Pranati Rakshit ◽  
Dharmpal Singh

2019 ◽  
Author(s):  
Ira Nath ◽  
Pranati Rakshit ◽  
Renesha Ghosh ◽  
Sourav Ghosh ◽  
Dharmpal Singh

2021 ◽  
Vol 11 (11) ◽  
pp. 4776
Author(s):  
Kyungbae Jang ◽  
Gyeongju Song ◽  
Hyunjun Kim ◽  
Hyeokdong Kwon ◽  
Hyunji Kim ◽  
...  

Grover search algorithm is the most representative quantum attack method that threatens the security of symmetric key cryptography. If the Grover search algorithm is applied to symmetric key cryptography, the security level of target symmetric key cryptography can be lowered from n-bit to n2-bit. When applying Grover’s search algorithm to the block cipher that is the target of potential quantum attacks, the target block cipher must be implemented as quantum circuits. Starting with the AES block cipher, a number of works have been conducted to optimize and implement target block ciphers into quantum circuits. Recently, many studies have been published to implement lightweight block ciphers as quantum circuits. In this paper, we present optimal quantum circuit designs of symmetric key cryptography, including PRESENT and GIFT block ciphers. The proposed method optimized PRESENT and GIFT block ciphers by minimizing qubits, quantum gates, and circuit depth. We compare proposed PRESENT and GIFT quantum circuits with other results of lightweight block cipher implementations in quantum circuits. Finally, quantum resources of PRESENT and GIFT block ciphers required for the oracle of the Grover search algorithm were estimated.


Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 685
Author(s):  
Raylin Tso

With the developments of mobile communications, M-commerce has become increasingly popular in recent years. However, most M-commerce schemes ignore user anonymity during online transactions. As a result, user transactions may easily be traced by shops, banks or by Internet Service Providers (ISPs). To deal with this problem, we introduce a new anonymous mobile payment scheme in this paper. Our new scheme has the following features: (1) Password-based authentication: authentication of users is done by low-entropy password; (2) Convenience: the new scheme is designed based on near field communication (NFC)-enabled devices and is compatible with EuroPay, MasterCard and Visa (EMV-compatible); (3) Efficiency: users do not need to have their own public/private key pairs and confidentiality is achieved via symmetric-key cryptography; (4) Anonymity: users use virtual accounts in the online shopping processes, thereby preventing attackers from obtaining user information even if the transaction is eavesdropped; (5) Untraceablity: no one (even the bank, Trusted Service Manager (TSM), or the shop) can trace a transaction and link the real identity with the buyer of a transaction; (6) Confidentiality and authenticity: all the transaction is either encrypted or signed by the sender so our new scheme can provide confidentiality and authenticity. We also present the performance and the security comparison of our scheme with other schemes. The results show that our scheme is applicable and has the most remarkable features among the existing schemes.


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