Methods and systems of data security in browser storage

A non-transitory machine readable medium storing one or more machine instructions, which when invoked cause a processor to implement a method comprising:

• receiving, at a server that includes at least a processor system having at least one processor and memory system, a passcode and encrypted content and a unique key identifier, wherein the content comprises at least a refresh token;
• in response to the receiving, performing the following,
• querying a local database for the encryption key based on the key identifier;
• decrypting the encrypted content with the key;
• determining whether the passcode stored previously within the content and the passcode provided by the user match one another;
• and
• returning the decrypted content to the user if the passcode decrypted and the passcode provided by the user match one another;
• wherein prior to the receiving of the encrypted passcode and encrypted content and the unique key identifier, receiving at the server, from a user device, the content and the passcode for encryption;
• in response,
• creating, by the server, a file;
• placing, by the server, the passcode and content in the file,
• generating, by the server, a unique encryption key and unique identifier of the key,
• storing in a storage location of the memory system the unique encryption key in association with a unique identifier,
• encrypting, by the server, the file in which the passcode and content were placed with the unique encryption key, therein creating the encrypted passcode and the encrypted content;
• sending from the server to the user device the encrypted file and the unique key identifier for storage at the user device.