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Securing Cloud Documents using client-side encryption

Specifically, write a program which on the command “Encrypt” does the following:

1. Encrypts a text file on a randomly generated key using AES-256 in the counter mode (CTR). 2. Appends to the resulting ciphertext its HMAC-SHA256 authentication tag (you will need another random key for the MAC). 3. Uploads the ciphertext alongs with the tag to Google Drive.

On the command “Decrypt”, the program does the following:

1. Downloads the file and the tag from Google Drive. 2. Verifies the MAC, and outputs a “Ciphertext Invalid!” error, if the tag is invalid and stops. 3. Decrypts the ciphertext and outputs the resulting text file.

Will discuss further details if interested.

Skills: Cryptography, Encryption, Google Cloud Platform, Google Cloud Storage, Python

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Project ID: #19292630

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umg536

Hello there, This is a default bid made. we'll discuss the price later in the chat after reading your project i can do this for you perfectly.I still have a few questions. please leave a message on my chat so we can di More

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