The Value of End-to-End Encryption

3 min readAug 10, 2022

With the prominence of personal information online, there has also been a keen interest in how to protect private and sensitive information best. Data storage is increasingly moving to cloud computing, requiring transmitting sensitive information back and forth between users and servers, opening up a potentially ripe field for cyber-attacks and vulnerabilities. One of the forerunners in data security is end-to-end encryption, a system that protects data by keeping it private along any transmission route.

End-to-end encryption is the virtual equivalent of locking your data in an impregnable safe and sending it to the only person who knows the combination. This level of security makes end-to-end encryption a precious and essential part of doing business in the 21st century. End-to-end encryption offers users and receivers the necessary protection for their message and data from the moment the user sends the information until the instant the recipient gets it. End-to-end encryption guarantees that no unauthorized user can read the data during transmission.

For example, services like Gmail, Google, or Microsoft give providers copies of the decryption keys, allowing access to users’ content on its servers, and enabling providers to read users’ email and files. In Google’s case, for example, this possession of decryption keys has allowed targeted advertisements to the Google account holder. Have you noticed that online ads seem slightly too on the nose — accessing user files and email accounts for some of that? But frankly, it’s a bit creepy.

A well-constructed end-to-end encrypted system disallows this invasive data access because the encryption system doesn’t allow providers access to the decryption keys. So, for people who value their privacy (and are sick of getting flooded with online ads!), end-to-end encryption is an absolute must!

End-to-end encryption protects users against more than irritating advertisements. End-to-end encryption keeps prying eyes away from the message because only the ends (the sender and receiver) have access to the decryption keys. So even if the message is visible to an intermediary server that relays it, it cannot be understood.

The critical element of end-to-end encryption is creating a public-private pair of keys. This method, also called asymmetric cryptography, uses separate cryptographic keys to secure and decrypt data.

Public keys are widely distributed and used to encrypt or lock messages. Everyone in the network (e.g., a corporation’s email system) can access the public key. Users encrypt their transmission using the public key and send it to the user with that public key. The information can only be decrypted with the correct private key, also called the decryption key. Private keys are only known by the respective owner at each end (the senders and receivers) and are used to decrypt or unlock the information.

Limiting access to sensitive data via robust private keys with end-to-end encryption is a must in today’s data transfer and sharing world. Future innovations in data security include homomorphic encryption, in which a set of keys used in end-to-end encryption are further shielded by a matching set of encryptions, with no agents — not even the sender or receiver — knowing the keys themselves.

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