ZERO KNOWLEDGE – DEFINITION
Zero knowledge is a security concept in data management. It means all information is encrypted at all times and no one can access the information without authorisation. The expression derives from the fact that no one has any access to the data – except those with permission.
Zero knowledge and cloud storage
Businesses and organizations used to store their information on a server placed at their offices. The emergence of cloud based storage has made it possible to store information in the cloud using the internet. There are numerous benefits to this.
But with this solution there are also new threats to your data. Unauthorised users, for example the cloud storage provider, may be able to access your data.
The problems of cloud storage
A chain is only as strong as its weakest link. This applies to data storage and cloud based information storage as well.
Cloud storage providers often speak of how they encrypt their clients’ data. Encryption is now standard with all serious cloud storage providers. This means your data is stored in encrypted form somewhere in the cloud. The encryption makes it harder for outsiders to access your data. Unless they have access to the encryption keys for your files.
This is one of the potential flaws of traditional cloud storage. You do not have control over who has access to your encryption keys, and thereby to your data.
Cloud storage backdoors
Many cloud storage providers are under obligation to help local authorities access the data they store for you. For example, in the US this is made completely legal under the so-called Cloud Act.
Many storage providers have terms and conditions giving them right to review what you store with them, even if the information is encrypted. They motivate this with wanting to ensure your data is in compliance with the law and also wanting to tailor your digital advertising experience.
This is exactly what Zero Knowledge is all about. Avoiding anyone accessing your encrypted information without your permission.