Contents
Why should sensitive data be encrypted?
To prevent disclosure of sensitive corporate data to unauthorized people in this new corporate environment, data needs to be secured. Using homomorphic encryption, sensitive data in plaintext is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted.
Is Javascript encryption secure?
Basically, secure javascript does not exist. The only way is to have everything be over HTTPS, because if you don’t, you expose your user to certain flaws. But once you have HTTPS, extra encryption via javascript is pointless: everything already is secure.
How do I encrypt my browser data?
Your web browser creates a session key, encrypts it with the server’s public key and sends the encrypted key to the server. The server uses its private key to decrypt the session key. The client and server use the session key to encrypt all further communications.
How to encrypt form data with JavaScript on?
The first option would be to use asymmetric encryption alone. Encrypt the form data on submission, with the public key. And since it is public, it cannot hurt for the client to know it. Then on the server, decrypt the data with the private key. Which is obviously private, and only the server knows it.
How does JavaScript encrypt the sensitive data?
Javascript uses hash to encrypt the sensitive data. Javascript calculates another hash from the given slow hash. Javascript submits the double hash and the encrypted data to server.
Why do I need encryption on top of HTTPS?
Generally, doing client side encryption on top of HTTPS in a web application is a lot of work, but it provides no extra security. The purpose of an extra crypto layer would be to protect against a MITM that has somehow managed to crack the TLS encryption.
Really you should not include any sensitive information in a cookie, and ones that do contain state data which you do not want modified should be signed using something like HMAC using a secret known only to the server. You should encrypt cookies by making them secure (only sent over HTTPS).