La Trobe University CYB5CYA Assignment 1: Cyber Algorithm Report

This report, prepared for the CYB5CYA course at La Trobe University, delves into the realm of cyber algorithms and their practical applications within a Medical Health Record (MHR) system. The report begins by outlining various use cases, including patient health information sharing, system login, and prescription writing, along with potential misuse scenarios. It then provides a brief survey of cryptographic algorithms, differentiating between symmetric and asymmetric key encryption methods, and examining substitution ciphers like AtBash and Caesar Cipher. The report also explores the use of ElGamal, RSA, and ECC encryption techniques. The core of the report focuses on the Triple DES algorithm, evaluating its suitability for enhancing the security of the MHR system and providing recommendations for its implementation. The report concludes with a discussion on the importance of encryption and decryption techniques for safeguarding essential data within the MHR system.

Running head: Cyber Algorithm
CYBER ALGORITHM
Name of the Student
Name of the University
Author Note

1Cyber Algorithm
Table of Contents
Introduction:...............................................................................................................................2
Description:................................................................................................................................2
Activity 1:...............................................................................................................................2
Activity 2:...............................................................................................................................4
Activity 3:...............................................................................................................................6
Recommendation:......................................................................................................................6
Conclusion:................................................................................................................................7
References:.................................................................................................................................8

2Cyber Algorithm
Introduction:
This report is divided into three activities. The first activity provides different use
cases and their functionality within the system, the second activity can display a brief survey
on the cryptographic algorithm and the last activities provide a recent cryptographic
algorithm.
Description:
Activity 1:
 5 use cases that can allow different users to interact with the MHR system.
1. Share patient health information.
2. Log in to the system.
3. Access patients' health information.
4. Write prescription.
5. Recommend patient to the specialists.
 The possible misuse cases for those use cases
1. Share health information among the wrong patient.
2. Sharing login credentials among another doctor.
3. Access patients for illegal purpose.
4. Write incorrect prescription.
5. Wrong specialists’ recommendation.
 Selecting Single-use case and providing the situation
Log in to the system:

3Cyber Algorithm
When a doctor needs to access patient information or write a prescription or
recommend a patient to the specialist, they need to log in order to access the system. Without
a successful login a doctor unable to access the system. After a successful login, they can
access patient information, write a prescription to the patient and recommend a specialist.
 Use case description as:
Name Login of a doctor.
ID UC1
Description To perform many tasks with the system every doctor needs to log in
first. Username and password are case sensitive. They need to provide
their credentials in order to access the system. Their credentials
provided during the registration. Username and password need to be
matched to use the system.
Actors Doctors.
Organizational
Benefits
MHR will have all activity details of a doctor. MHR can track every
activity of a doctor and use it accordingly. With the help of this
system a doctor unable to misuse the system.
Frequency of Use Every time when a doctor needs to access patient information or write
a prescription or recommend a patient to the specialist
Triggers When a doctor need patient information
Preconditions Every activity of a doctor must be stored in the system.
Post-conditions The organization will have every activity of a doctor.
Main Course 1. Doctor browse the system.
2. Doctors provide their credentials.
3. Click on login button

4Cyber Algorithm
Activity 2:
1.
Symmetric key algorithm:
This is a simple and powerful algorithm or encryption that can contain only one key
cipher and decipher information (Tuncer and Avaroğlu. 2017). This algorithm uses a key that
can be a number, word or any string of letters.
Asymmetric key algorithm:
This algorithm also known as public-key cryptography. This algorithm uses two keys
for encryptions. Only legitimate person can use the keys.
Symmetric versus Asymmetric Key
 A single key is used in the symmetric encryption and that need to be shared among
every people who required to receive the message (Henriques and Vernekar. 2017). In
another hand, asymmetrical encryption uses multiple keys and one private key for the
encrypt and decrypt a message.
 Symmetric encryption is a very old method while using of asymmetrical encryption
method is relatively new.
Asymmetrical encryption takes a long time to encryption and decryption while Symmetric
encryption takes less time compared to Asymmetrical encryption (Al-Shabi. 2019).
2.
AtBash Substitution Cipher

5Cyber Algorithm
This is one type of substitution cipher and it can replace every letter after reversing a
letter. But this cipher does not provide any key this is the main reason to unable to provide
security in communication (Maqsood et al. 2017). MHR can use this cipher for patient
registration or doctor log in, but it fails to provide security so I cannot suggest to use this
method.
Caesar Cipher Substitution:
This is an elementary method of encryption that can encrypt the test message to
protect from various threats. During encryption, a person can check every letter of the
message in the "plain text" and they can write down the matching letter in "ciphertext".
Decoding can be done in the reverse way, with the right shift of 3(Patil et al. 2016). MHR
can use this method for sensitive communication between a doctor and patient.
3.
I can use different encryption and decryption techniques for secure communication in
the MHR. Some of these are discussed below:
ElGamal Encryption:
This is asymmetric key cryptography and it can be used to represent the text as a
series of numbers. We can use to save information in MHR for a secure connection.
RSA:
This is also a symmetric key encryption method and it can encrypt the whole data
over the internet. This technique can be used to save information over the internet in MHR.
ECC:

6Cyber Algorithm
This encryption can be used for digital signature, pseudo-random generators and key
agreement that is needed in MHR.
Activity 3:
1. I have used google search and google schooler as well for the research paper where I
have found many scholar articles that provides a detailed overview of encryption and
decryption technique.
2. Most relevant algorithm is Triple DES. It is the most suitable algorithm to solve many
issues in MHR.
3. The triple-DES or triple data encryption is one type of computerized algorithm where
cipher algorithms are implemented to catch data block (ALI et al.2017). To ensure the
data security this algorithm can increase its key size. In this algorithm every key is
independent (Siahaan. 2016). The main advantages of this algorithm are its key size.
This algorithm can encrypt input three times
4. With the help of triple DES, it can solve many security issues of MHR. With the help
of this algorithm, MHR can perfectly encrypt every essential information of doctor
and patient and specialists. This encryption can help the organization from being
disposed of their information.
Recommendation:
 Triple DES can be used for more security.
 Organization must monitor every activity of a doctor.
 Before sharing the patient, information organization must provide legitimate details to
every patient.

7Cyber Algorithm
Conclusion:
This, it can be concluded that with the help of encryption and description techniques
every essential data can be saved. Provided use case and its misuse will help the authority to
protect their data. a recent cryptographic algorithm triples des is helpful for this organization
to save essential information.

8Cyber Algorithm
References:
Patil, P., Narayankar, P., Narayan, D.G. and Meena, S.M., 2016. A comprehensive evaluation
of cryptographic algorithms: DES, 3DES, AES, RSA and Blowfish. Procedia Computer
Science, 78(1), pp.617-624.
Maqsood, F., Ahmed, M., Ali, M.M. and Shah, M.A., 2017. Cryptography: A comparative
analysis for modern techniques. International Journal of Advanced Computer Science and
Applications, 8(6), pp.442-448.
Al-Shabi, M.A., 2019. A Survey on Symmetric and Asymmetric Cryptography Algorithms in
information Security. International Journal of Scientific and Research Publications
(IJSRP), 9(3).
ALI, M.I., AHMED, M.Z., MAHMOOD, M.T. and RAHMAN, S., 2017. AES, DES, Triple
DES Encryption Efficiency Analysis.
Siahaan, A.P.U., 2016, August. Three-Pass Protocol Concept in Hill Cipher Encryption
Technique. In Seminar Nasional Aplikasi Teknologi Informasi (SNATI).
Henriques, M.S. and Vernekar, N.K., 2017, May. Using symmetric and asymmetric
cryptography to secure communication between devices in IoT. In 2017 International
Conference on IoT and Application (ICIOT) (pp. 1-4). IEEE.
Tuncer, T. and Avaroğlu, E., 2017, May. Random number generation with LFSR based
stream cipher algorithms. In 2017 40th International Convention on Information and
Communication Technology, Electronics and Microelectronics (MIPRO) (pp. 171-175).
IEEE.