Example Decrypt where K: 7416352 CT: UNZANQRZAENXNUIDNDFYNCOYAOUI

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
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please fullfile table for example.png I also provided 2.png as example gow to do it 

## 2. Row Transposition Cipher

### Instructions:
- **Write the message row-wise.**
- **Read the message column-wise, in some specific order.**

### Example:

#### Key:
- 4, 3, 1, 2, 5, 6, 7

#### Plaintext Grid:
- Row 1: a, t, t, a, c, k, p
- Row 2: o, s, t, p, o, n, e
- Row 3: d, u, n, t, i, l, t
- Row 4: w, o, a, m, x, y, z

### Ciphertext:
- TTNAAPTMTSUOAODWCOIXKNLYPETZ

### Explanation:
The grid above shows how the plaintext message is arranged row-wise. The key indicates the order in which the columns should be read to generate the ciphertext. For example, the first number in the key is 4, so the fourth column is read first, followed by the columns in the order specified by the key. The result is the ciphertext shown.
Transcribed Image Text:## 2. Row Transposition Cipher ### Instructions: - **Write the message row-wise.** - **Read the message column-wise, in some specific order.** ### Example: #### Key: - 4, 3, 1, 2, 5, 6, 7 #### Plaintext Grid: - Row 1: a, t, t, a, c, k, p - Row 2: o, s, t, p, o, n, e - Row 3: d, u, n, t, i, l, t - Row 4: w, o, a, m, x, y, z ### Ciphertext: - TTNAAPTMTSUOAODWCOIXKNLYPETZ ### Explanation: The grid above shows how the plaintext message is arranged row-wise. The key indicates the order in which the columns should be read to generate the ciphertext. For example, the first number in the key is 4, so the fourth column is read first, followed by the columns in the order specified by the key. The result is the ciphertext shown.
### Example

**Task:** Decrypt

- **Key (K):** 7416352
- **Ciphertext (CT):** UNZANQRZAENXNUIDNDFYNCOYAOUI

**Instructions for Decryption:**

To decrypt the given ciphertext using the key provided, follow these steps commonly used in manual decryption methods, such as the Vigenère cipher or other polyalphabetic cipher systems:

1. **Understand the Key:** The key provided (7416352) suggests a numerical or positional shift that might be used repeatedly to decode the letters.

2. **Align with Ciphertext:** Match each number in the key consecutively with each letter in the ciphertext. If the ciphertext is longer than the key, repeat the key sequence as needed.

3. **Decrypt the Message:** Use the aligned key to shift each letter in the ciphertext backward in the alphabet by the number represented in the key. For instance, if the first letter ‘U’ is aligned with ‘7’, shift ‘U’ 7 places back in the alphabet.

4. **Read the Plaintext:** Continue this process for the entire ciphertext to reveal the plaintext message.

**Note:** Decryption may require a particular method or cipher known to be applicable, such as a Vigenère table or Caesar shift for polyalphabetic sequences. Ensure to apply the correct logic matching the encryption used.
Transcribed Image Text:### Example **Task:** Decrypt - **Key (K):** 7416352 - **Ciphertext (CT):** UNZANQRZAENXNUIDNDFYNCOYAOUI **Instructions for Decryption:** To decrypt the given ciphertext using the key provided, follow these steps commonly used in manual decryption methods, such as the Vigenère cipher or other polyalphabetic cipher systems: 1. **Understand the Key:** The key provided (7416352) suggests a numerical or positional shift that might be used repeatedly to decode the letters. 2. **Align with Ciphertext:** Match each number in the key consecutively with each letter in the ciphertext. If the ciphertext is longer than the key, repeat the key sequence as needed. 3. **Decrypt the Message:** Use the aligned key to shift each letter in the ciphertext backward in the alphabet by the number represented in the key. For instance, if the first letter ‘U’ is aligned with ‘7’, shift ‘U’ 7 places back in the alphabet. 4. **Read the Plaintext:** Continue this process for the entire ciphertext to reveal the plaintext message. **Note:** Decryption may require a particular method or cipher known to be applicable, such as a Vigenère table or Caesar shift for polyalphabetic sequences. Ensure to apply the correct logic matching the encryption used.
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