scholarly journals A Symmetric Key Cryptographic Algorithm

2010 ◽  
Vol 1 (15) ◽  
pp. 1-6 ◽  
Author(s):  
Ms Ayushi
Keyword(s):  
Cryptographic Algorithm ◽  
Symmetric Key

scholarly journals A New Symmetric Key Cryptographic Algorithm using Paley Graphs and ASCII Values

2021 ◽  
Vol 297 ◽  
pp. 01046
Author(s):  
Zhour Oumazouz ◽  
Driss Karim
Keyword(s):  
Brute Force ◽  
Strong Regularity ◽  
Quadratic Residues ◽  
Cryptographic Algorithm ◽  
Paley Graph ◽  
Encryption And Decryption ◽  
Symmetric Key ◽  
Brute Force Attack ◽  
The Moment ◽  
Paley Graphs

The main objective of the study conducted in this article is to introduce a new algorithm of encryption and decryption of a sensitive message after transforming it into a binary message. Our proposed encryption algorithm is based on the study of a particular graph constructed algebraically from the quadratic residues. We have exploited the Paley graph to introduce an abstract way of encryption of such message bit according to the other message bits by the intermidiate study of the neighborhood of a graph vertex. The strong regularity of the Paley graphs and the unknown behavior of the quadratic residues will play a very important role in the cryptanalysis part which allows to say that the brute force attack remains for the moment the only way to obtain the set of possible messages.

scholarly journals A New Hybrid Cryptography Technique in Wireless Sensor Network

2019 ◽  
Vol 8 (10) ◽  
pp. 121-131
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Traditional Approach ◽  
Computation Time ◽  
Data Encryption ◽  
Wireless Sensor ◽  
Secret Key ◽  
Cryptographic Algorithm ◽  
Encryption And Decryption ◽  
Symmetric Key

The wireless sensor network is a large number of tiny nodes installed in insecure environment for monitoring, gathering and transferring data and are prone to security threats for its limited resources. In order to transmit the data and to protect from different attacks in the network, security is maintained. To achieve confidentiality, authenticity and authorization of data which secure the data from different attacks cryptographic algorithm were used. The number of keys used in the cryptographic algorithm determines the security of the data. Cryptographic algorithms are broadly classified into two types symmetric cryptography and asymmetric cryptography. In the symmetric key cryptographic algorithm, a secret key is shared in the network and in asymmetric key cryptographic algorithm two keys are used for data security. In wireless sensor network, symmetric key cryptography required more storage to store the key among all the nodes of the network and in asymmetric key cryptography more computation time is require for the data encryption and decryption. To avoid memory and computation overhead we proposed a hybrid cryptosystem to handle the security in the wireless sensor network. Initially shared key is exchanged among nodes using ECC which is a public key algorithm. Data is encrypted and decrypted using RC4 symmetric key algorithm. Various performance measures such as time taken for encryption and decryption process and memory needed for storing cipher text data. The proposed model shows faster encryption of data and takes less memory for key storage as compared to the traditional approach.

Securing Stored Biometric Template Using Cryptographic Algorithm

2018 ◽  
Vol 5 (4) ◽  
pp. 48-60
Author(s):  
Manmohan Lakhera ◽  
Manmohan Singh Rauthan
Keyword(s):  
Aes Algorithm ◽  
Cryptographic Algorithm ◽  
Biometric Template ◽  
Long Time ◽  
Template Protection ◽  
Symmetric Key ◽  
Authentication System ◽  
Brute Force Attack ◽  
Biometric Templates ◽  
Biometric Template Protection

The biometric template protection technique provides the security in many authentication applications. Authentication based on biometrics has more advantages over traditional methods such as password and token-based authentication methods. The advantage of any biometric-based authentication system over a traditional one is that the person must physically be present at that place while recognizing him. So, it is essential to secure these biometrics by combining these with cryptography. In the proposed algorithm, the AES algorithm is used for securing the stored and transmitted biometric templates using helping data. The helping data is a variable type of data which is changed at every attempt for registration. The final symmetric key AES algorithm is a combination of helping data and actual symmetric keys of the AES algorithm. The experimental analysis shows that a brute force attack takes a long time to recover the original biometric template from cipher biometric template. So, the proposed technique provides sufficient security to stored biometric templates.

scholarly journals A Hybrid Security Algorithm AES and Blowfish for Authentication in Mobile Applications

2018 ◽  
Vol 5 (1) ◽  
pp. 80
Author(s):  
Aji Purwinarko ◽  
Wahyu Hardyanto
Keyword(s):  
Mobile Phones ◽  
Mobile Applications ◽  
Mobile Application ◽  
Block Size ◽  
Advanced Encryption Standard ◽  
Business Transactions ◽  
Cryptographic Algorithm ◽  
Man In The Middle ◽  
Symmetric Key ◽  
Security Algorithm

Nowadays, everything is within our grasp and with the mobile phones become easier. Its use is not limited to calls and SMS but has become a tool that can be used to serve business transactions, banking, academic of data through mobile applications. Tus, the security of authentication in the mobile application needs to be improved to avoid a hacker attack. This article presents an authentication in the mobile application to the server using a hybrid of cryptographic algorithm Advanced Encryption Standard (AES) and Blowfish. AES and Blowfish is a symmetric key algorithm is very fast and powerful. With the utilization of a large block size of AES and Blowfish to encrypt keys, AES security will be much more robust and complicated to attacked. So, it will be difficult for hackers to perform Man in the Middle (MitM) attacks.

scholarly journals Two Layer Image Encryption using Symmetric Key Algorithms

2020 ◽  
Vol 9 (7) ◽  
pp. 1056-1059
Keyword(s):  
Image Encryption ◽  
Turing Test ◽  
Secret Key ◽  
Private Key ◽  
Aes Algorithm ◽  
Cryptographic Algorithm ◽  
Cryptographic Algorithms ◽  
Layer Image ◽  
Symmetric Key ◽  
Complete Process

Security of data (text, audio, and images) is becoming more complex with the increment in its amount. In order to upsurge the reliability, the captcha (Completely Automated Public Turing test to tell Computers and Humans Apart) is used to ensure authenticity. In contrast, even these captchas can be hacked and security can be easily impeached, aim of these captchas is to identify if the user is genuine or else if it is just a robot trying to spam the system. This paper presents auxiliary hybridization of AES and Blowfish cryptographic algorithms for image encipherment and decipherment. Here, AES is using Blowfish as its subroutine where Blowfish encrypts and decrypts the AES encoded image. This is then handed to AES for second level decryption. Here the image which is to be encrypted is applied to AES algorithm, its output is further used as an input for Blowfish algorithm. Output of this doubly encrypted image is then decrypted in the reverse order of encipherment. This auxiliary hybridization adds security to the image rendering it the capacity to become useful in highly important organizations. Private key cryptography uses single secret key at both, the sender and the receiver end. Using symmetric key cryptographic algorithm for this process makes the complete process fast and more secure in comparison to when asymmetric cryptographic algorithms are used for the same purpose. Moreover, symmetric key cryptographic algorithms are more suitable for larger files and images. These also help in maintaining the confidentiality of the data.

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