File Encryption and Decryption in Java using AES

Learn how to implement file encryption and decryption in Java using the AES algorithm to secure your sensitive data. Encrypt and decrypt files with ease using Java programming.
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File encryption and decryption are essential techniques for securing sensitive data. One widely used encryption algorithm is AES (Advanced Encryption Standard), known for its robust security and efficiency. In Java, implementing file encryption and decryption using AES is straightforward and offers a reliable method to protect your files from unauthorized access.

Encrypting a File using AES

To encrypt a file using AES in Java, follow these steps:

Choose a Secret Key: Generate a secret key for AES encryption. You can use KeyGenerator class to generate a key.

Create Cipher Instance: Initialize a Cipher object with the AES encryption mode.

Read File Content: Read the content of the file into a byte array.

Encrypt File Content: Use the initialized Cipher object to encrypt the file content.

Write Encrypted Content to File: Write the encrypted content back to a new file.

Decrypting a File using AES

To decrypt a file encrypted with AES in Java, perform the following steps:

Load Secret Key: Load the secret key used for encryption.

Create Cipher Instance: Initialize a Cipher object with the AES decryption mode.

Read Encrypted File Content: Read the encrypted content of the file into a byte array.

Decrypt File Content: Use the initialized Cipher object to decrypt the file content.

Write Decrypted Content to File: Write the decrypted content back to a new file.

Example Code

[[See Video to Reveal this Text or Code Snippet]]

This example demonstrates how to encrypt and decrypt a file using AES in Java. Make sure to handle exceptions properly and manage resources efficiently in a real-world scenario.

Implementing file encryption and decryption using AES in Java provides a reliable method to secure sensitive data, ensuring confidentiality and integrity.