https://github.com/taimoorzaeem/fcrypt

A command line tool to encrypt and decrypt file using a symmetric key.
https://github.com/taimoorzaeem/fcrypt

c cryptography encryption-algorithm encryption-decryption file file-encryption

Last synced: 5 months ago
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A command line tool to encrypt and decrypt file using a symmetric key.

• Host: GitHub
• URL: https://github.com/taimoorzaeem/fcrypt
• Owner: taimoorzaeem
• License: gpl-3.0
• Created: 2021-09-28T14:02:53.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2022-11-16T13:56:28.000Z (over 3 years ago)
• Last Synced: 2024-11-23T06:42:49.596Z (over 1 year ago)
• Topics: c, cryptography, encryption-algorithm, encryption-decryption, file, file-encryption
• Language: C
• Homepage:
• Size: 54.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Fcrypt

A command line tool to encrypt and decrypt a file using a symmetric key.

This implementation uses a Vigenère Cipher with a little twist. It take one's complement after xoring which is also symmetric.

I have also append a dynamic key signature at the end of encrypted file which would detect and notify the user if a wrong key was used in decryption.

### Status

I wrote this for a school project for my programming fundamentals class.

**To build:**

```

$ make

```

**To install:**

```

$ make

$ sudo make install

```

**Using the tool:**

To encrypt a file:

```

$ fcrypt -e  

```

To decrypt the same file:

```

$ fcrypt -d  

```

**To uninstall:**

```

$ sudo make uninstall

```