# Field-Level Data Decryptor Decrypt specific fields in CSV data using various decryption methods to restore encrypted information > Canonical page: https://elysiatools.com/en/tools/field-decryptor - **Category:** Security - **Keywords:** decryption, csv, data security, field decryption, aes, base64, caesar, privacy, data restoration, decode ## Overview The Field-Level Data Decryptor is a secure utility designed to restore encrypted or obfuscated information within CSV datasets. It supports multiple decryption methods, including AES, Base64, and Caesar cipher, allowing you to selectively target specific columns while maintaining your original data structure. ## Inputs - **Encrypted CSV Data Input** (textarea): Enter your encrypted CSV data... Example: Name,Email,Phone,SSN,Salary John Doe,am9uZW1haWwuY29t,555-0123,MTIzLTQ1LTY3ODk=,50000 Jane Smith,amFuZUBlbWFpbC5jb20=,555-0456,Ojk4Ny02NS00MzIx,60000 Bob Wilson,Ym9iQGVtYWlsLmNvbQ==,555-0789,NDU2LTc4LTkwMTI=,45000 - **Decryption Method** (select) - **Fields to Decrypt (optional)** (text): Specify which CSV columns to decrypt. If empty, all fields will be decrypted by default. - **Decryption Key (for AES)** (text): Only required for AES decryption method. Use the same key that was used for encryption. - **Caesar Cipher Shift Amount** (number): Number of positions to shift back for Caesar cipher decipher (1-25) - **Preserve Original Structure** (checkbox): Keep CSV headers and maintain original data structure - **Export Format** (select) - **Output Only Decrypted Data** (checkbox): Skip detailed analysis and only output decrypted data ## When to use - When you need to recover readable data from CSV files containing obfuscated or encrypted columns. - When you have a specific decryption key for AES-encrypted fields that need to be restored to plain text. - When you need to batch-process encoded strings like Base64 or Caesar-shifted values across large datasets. ## How it works - Paste your CSV data into the input area and select your preferred decryption method from the dropdown menu. - Specify the target columns you wish to decrypt, or leave the field blank to process the entire dataset. - Provide any necessary parameters, such as an AES decryption key or a Caesar shift amount, to ensure accurate restoration. - Choose your desired output format and click to process, maintaining the original CSV structure or exporting as clean JSON. ## Use cases - Restoring sensitive customer contact information that was obfuscated for transit. - Decoding legacy system exports that utilized simple Caesar or Base64 encoding. - Decrypting specific database fields exported to CSV using a known AES security key. ## Frequently asked questions ### Which decryption methods are supported? The tool supports Base64 decoding, Caesar cipher deciphering, AES decryption, and simple string reversal. ### Can I decrypt only specific columns? Yes, you can specify the column names in the 'Fields to Decrypt' input to target only the data that requires restoration. ### Is a key required for all methods? No, a key is only required for AES decryption. Other methods like Base64 or Caesar cipher use standard algorithms or shift values. ### Will my CSV headers be preserved? Yes, if you enable the 'Preserve Original Structure' option, the tool will keep your headers and formatting intact. ### Can I export the results in a format other than CSV? Yes, you can choose to export your decrypted data as either a CSV or a JSON file. ## Related tools - [Field-Level Data Encryptor](https://elysiatools.com/en/tools/field-encryptor): Encrypt specific fields in CSV data using various encryption methods to protect sensitive information - [Excel Field-Level Decryptor](https://elysiatools.com/en/tools/excel-field-decryptor): Decrypt specific fields in Excel files using various decryption methods to restore encrypted information - [Base64 Converter](https://elysiatools.com/en/tools/base64-converter): Encode and decode data to/from Base64 format with URL-safe options - [Text to CSV Converter](https://elysiatools.com/en/tools/text-to-csv): Convert various text formats to CSV with customizable parsing options - [Base64 to Image Converter](https://elysiatools.com/en/tools/base64-to-image): Convert Base64 encoded images back to image files with support for various formats - [XML to CSV Converter](https://elysiatools.com/en/tools/xml-to-csv): Convert XML data to CSV format with customizable parsing options - [CSV Row Column Transposer](https://elysiatools.com/en/tools/csv-row-column-transposer): Transpose CSV data by converting rows to columns, with support for various delimiters and output formats - [Data Column Extractor](https://elysiatools.com/en/tools/data-column-extractor): Extract specific columns from tabular data with support for various formats and flexible column selection ## Samples - [CSV Samples](https://elysiatools.com/en/samples/csv-samples): Sample CSV files with various data types, sizes, and complexity levels - [Python Samples](https://elysiatools.com/en/samples/python): Essential Python code examples and Hello World demonstrations - [Windows String Processing - C# Samples](https://elysiatools.com/en/samples/windows-string-processing-csharp): Comprehensive C# string processing examples for Windows platform including string manipulation, splitting, joining, regex operations, and text analysis - [Android Cryptography Java Samples](https://elysiatools.com/en/samples/android-cryptography-java): Android Java cryptography examples including hash calculation, AES encryption/decryption, and Base64 encoding ## Related content - [Document Encryption and Permissions Workflow](https://elysiatools.com/en/hubs/document-encryption-permissions-workflows): Protect files and selected data fields, open encrypted PDFs with authorized credentials, set or remove permissions, and verify reversible output and reader compatibility.