Create an encrypted zip archive with PHP

Question

I am searching for a way to encrypt a .txt file into a zip, but in a secure password protected way. My goal is to email this file to me, without anyone being able to read th

Answer 1

This is how I did it. It's with an excel, but it's the same thing.

• Let php create a random codename.
• Save the codename in db or in a file to be included by the retrieve.php.

• Mail yourself the codename.

• Access via web the retrieve.php?codename=[codename]

• Let php check if codename is correct. (maybe even it's age).
• Create the excel/textfile in memory from the data that needs to be send to you.
• Create an encryption code by adding a local password (that only you know) with the codename.( I say add but can also be mixed or xor-ed or substr... )
• Encrypt on the fly with the created encryption code.
• Remove the codename from db or config file.
• Return this encrypted document in a mail (zipped or not for size).

• Maybe add two first characters from codename in the mail to know what local full codename to use.

• Use a local decryption script to decode the downloaded file. Use same codename/password algorithm to create a decryption key.

I use gibberish-aes-php. ( https://github.com/ivantcholakov/gibberish-aes-php )
Because then I can use https://github.com/mdp/gibberish-aes as javascript on a client decoder (for things I want to take a quick peek at in a browser).