However, a new attack demonstrated at the Black Hat Conference proves otherwise.

They named asHEIST, which stands forHTTPEncryptedInformation can beStolen throughTCP-Windows.

This page is protected in most cases by HTTPS.

HEIST attack : Hackers can steal your confidential data on SSL/TLS sites

HEIST basically brute-forces the size of small portions of data that get added to a page as it loads.

As such, the attack can take a while.

The two presented theirfindings[pdf] at Black Hat on Wednesday.

HEIST attack breakdown

However, this is not possible in todays world as most browsers use JavaScript to perform important functions.

Even banking websites use JavaScript popups for passwords and OTPs.

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source: www.techworm.net