Secured file sharing system

A method for facilitating secure file sharing, comprising:

• obtaining, by a first device of a first user, a first sub-file of a data file from an electronic communication sent from a second device of a second user, wherein the first sub-file represents a portion of the data file;
• identifying a link associated with a second sub-file of the data file from the electronic communication, wherein the second sub-file is uploaded to a cloud provider, and wherein the link is protected based on a verification code;
• obtaining the verification code from the first user, wherein the verification code is sent to a cell phone number of the first user;
• obtaining the second sub-file from the cloud provider by providing the verification code to a portal, wherein the link leads to the portal;
• retrieving a plurality of coded fragments of the data file from the first and second sub-files, wherein the plurality of coded fragments are generated from the data file based on a generator matrix of erasure encoding, and wherein a respective coded fragment of the plurality of coded fragments does not include plaintext data of the data file;
• and
• reconstructing the data file from the plurality of coded fragments based on a decoder matrix of the erasure encoding, wherein the decoder matrix is determined based on the generator matrix used to generate the plurality of coded fragments.

A computer system operating as a first device of a first user, the computer system comprising:

• a processor;
• and
• a storage device storing instructions that when executed by the processor cause the processor to perform a method, the method comprising:
• identifying, by the computer system, a data file to be sent to a second device of a second user;
• generating a plurality of coded fragments from the data file based on a generator matrix of erasure encoding, wherein a respective coded fragment of the plurality of coded fragments does not include plaintext data of the data file;
• generating a plurality of sub-files of the data file, wherein a respective sub-file comprises one or more coded fragments;
• attaching a first sub-file of the plurality of sub-files to an electronic communication destined to the second device;
• uploading a second sub-file of the plurality of sub-files to a cloud provider;
• embedding a link associated with the uploaded second sub-file into the electronic communication, wherein the link is protected based on a verification code;
• sending the electronic communication to the second device;
• and
• sending the verification code in a text message to a cell phone of the second user.