1. Encryption is the process of encoding data in cryptography.

2. This process transforms the plaintext or original representation of data into ciphertext or alternative representation of the data.

3. Only authorized parties should be able to decipher the ciphertext back into plaintext and access the original data.

4. Encryption in itself does not prevent interference, but it hinders interceptors from deciphering the content.

1. There are a total of 12 function keys on the keyboard, labelled F1 to F12.

2. These keys usually perform a special function defined by the operating system or the currently running program.

- F1 key: It is used as a help key in almost every program. When this key is pressed a help screen opens.

- F2 key: In Microsoft Windows, renames a highlighted icon, file, or folder in all versions of Windows.

- F3 key: When on the Windows desktop, often opens a search feature for many programs, including Microsoft Windows.

- F4 key: Use to open or find a window in Windows 95 to XP.

- F5 key: In all modern Internet browsers, pressing F5 refreshes or reloads the page or document window.

- F6 key: Move the cursor to the address bar in Internet Explorer, Mozilla Firefox, and most other Internet browsers.

- F7 key: Commonly used to perform a grammar check in Microsoft programs, such as Microsoft Word, Outlook, etc.

- F8 key: It is used to enter the Windows Startup Menu.

- F9 key: Used to refresh the document in Microsoft Word.

- F10 key: In Microsoft Windows, activate the menu bar of an open application.

- F11 key: Used to enter and exit full-screen mode in all modern Internet browsers.

- F12 key: Use the Save As window in Microsoft Word.

To save MS-Office documents in PDF file format, you can follow the following steps-

1. Open your MS-Office document.

2. Click on the File tab.

3. Click on Save As.

4. Select PDF from the Save As Type drop-down list.

4. In the File Name box, enter a name for your document.

5. Click on Save.