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        "author": "Yiren Zhou",
        "author_email": "yiren.chow@gmail.com",
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        "classifiers": [
            "Development Status :: 2 - Pre-Alpha",
            "License :: OSI Approved :: MIT License",
            "Programming Language :: Python :: 3.6",
            "Topic :: Security :: Cryptography"
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        "description": "# GnuPG Eternal - Large File Encryption with Line Modification\n\nGnuPG Eternal enables developers and data scientists to encrypt and decrypt large files while modifying them in memory. It is specifically designed for de-tokenization + encryption of sensitive data such as account numbers and social insurance numbers, where raw data is not allowed to live on the local storage of the system. \n\n## Use Case\nOne primary example is for transferring and processing PANs. Provided is a file of customers' PANs that are tokenized. The requirement is to send the encrypted and de-tokenized PANs to the receiver. \n\nHowever, because PANs are highly sensitive, the de-tokenized/raw PANs cannot touch the local storage of the system. Hence, de-tokenization and encryption need to happen in system memory.\n\n## Advantage\nTraditionally, the content of the whole file can be loaded into memory if wanted, and the developer/data scientist can manipulate the data depending on his/her needs. \n\nAs the file size increases to a certain point where the system cannot hold it any more, the program would crash.\n\nGnuPG Eternal allows the developer/data scientist to manipulate and encrypt files regardless of their sizes: that is, the maximum space consumption is **constant**, provided that the file is not one massive line of data. \n\n## Quick Start\nInstall via pip:\n\n```pip install gpgeternal```\n\n## Basic Example\nWith the file to manipulate on the local storage, define the path to the file and the path to the processed/manipulated file. *The file to process must exist*. \n\nDefine the recipient of the encrypted file and the manipulation method for each line (ex. de-tokenization method that returns the de-tokenized line).\n\n```python\nimport gpgeternal\n\ndef manipulation_func(line):\n    # The example manipulation method\n    line = line.replace('Foobar', 'cipher')\n    return line\n\ndef main():\n    file_to_encrypt = 'test.txt'  # File to manipulate and encrypt\n    recipient = 'yiren.zhou@edu.uwaterloo.ca'  # Email of the recipient (GnuPG)\n    output_file = 'test.pgp'   # Name of the encrypted & manipulated file\n\n    gpgeternal.encrypt_large_file(recipient, file_to_encrypt, output_file, manipulation_func)\n\nif __name__ == '__main__':\n    main()\n```",
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