Tool Name: DES Decryption Tool

Tool Description:
The DES Decryption Tool is a tool used to decrypt DES encrypted data. It can decrypt encrypted data and supports multiple encryption modes and padding options.

Features:
1. Supports decryption of DES encrypted data.
2. Supports multiple encryption modes and padding options.
3. Supports file input and output.
4. Supports automatic save settings.

Use Cases:
1. Data decryption: This tool can be used to decrypt DES encrypted data when needed.
2. Data security: When transmitting or storing data, DES encryption algorithm can be used to encrypt data. This tool can be used to decrypt encrypted data to ensure data security.
3. Data format conversion: This tool can be used to decrypt encrypted data when performing data format conversion, so that data can be better processed and analyzed.