**Understanding Symmetric Encryption: A Model Exploration***Figure 2.2 shows a model of symmetric encryption/decryption.*In your own words (do not quote in any way from any source), briefly explain why (in a typical scheme) a plaintext value \( X \) is **not** simply transferred over the Secure Channel shown, and give one (1) example of such a channel (real or hypothetical) that shows why this typically is not done.---**Explanation:**In symmetric encryption, the main goal is to ensure that the information being communicated (plaintext value \( X \)) remains confidential and secure from unauthorized access during the transfer process. Simply transferring plaintext over a secure channel is not typically done because there is always a risk that the secure channel might be compromised. Even secure channels can be subject to vulnerabilities such as interception by attackers, who might be able to access the data if it is not encrypted. Encrypting the data adds an additional layer of security, ensuring that even if the communication channel is breached, the actual data remains protected and unintelligible to unauthorized individuals.**Example:**Consider a real-world example of online banking. Banks use secure channels (such as HTTPS) to protect transactions. However, they also use encryption to ensure that sensitive information, like account numbers and passwords, remains secure. This way, even if an attacker manages to intercept the data being transmitted over HTTPS, the encryption ensures that the intercepted data is still unreadable.---Through this explanation, it is clear that encryption is a fundamental component of secure communication, providing necessary protection beyond what is offered by secure channels alone. ### Formal Model: Symmetric Cryptosystem#### DescriptionThe diagram illustrated is a formal model of a symmetric cryptosystem, commonly used in cryptography for secure communication. Below is a detailed explanation of each component and the data flow within the system.1. **Message Source (X):** - This is the origin of the original message, which is represented as "X."2. **Encryption Algorithm:** - The message "X" is fed into the encryption algorithm. - The encryption algorithm transforms the message into ciphertext "Y" using a secret key "K" that it receives from the key source.3. **Key Source:** - This component generates and supplies the secret key "K" used by both the encryption and decryption algorithms. - The secret key "K" is transmitted securely to the decryption algorithm via a secure channel.4. **Secure Channel:** - This channel ensures safe transmission of the secret key "K" from the key source to the decryption algorithm, preventing unauthorized access.5. **Decryption Algorithm:** - The decryption algorithm receives the ciphertext "Y" and the secret key "K" from the secure channel. - It uses the key to transform the ciphertext back into the original message "X."6. **Destination:** - This is the final recipient of the original message "X" after it has been successfully decrypted.7. **Cryptanalyst:** - This component represents potential eavesdroppers or attackers who may attempt to recover the original message "X" or the secret key "K" from the ciphertext "Y." - The recovered message and key by the cryptanalyst are represented as "Ẋ" and "Ḳ" respectively.#### Diagram Key- **X:** The original message.- **K:** The secret key.- **Y:** The ciphertext (encrypted message).- **Ẋ, Ḳ:** Attempted recovered message and key by the cryptanalyst.#### Figure Reference- **Figure 2.2:** Model of Symmetric Cryptosystem. This model emphasizes the flow of information and the critical importance of securing the secret key, which is the cornerstone of symmetric cryptosystem security.#### Practical Application:Understanding this model is fundamental for students and professionals in cryptography. It highlights the role of encryption and decryption algorithms, the need for secure key distribution, and the potential threats

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Answered: ur own words (do not quote in any way…

ur own words (do not quote in any way from a y explain why (in a typical scheme) a plaintex E simply transferred over the Secure Channel s] ive one (1) example of such a channel (real or

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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