End-to-end encryption, or E2EE, is a technique for secure messaging where messages are encoded at the sender's end and decoded solely at the receiver's device. It prevents service providers and other intermediaries from viewing the message content during transmission.[1] 
E2EE frequently relies on cryptographic keys for encrypting and decrypting information. Even if an adversary captures the transmission, the encoded data ought to remain unintelligible unless the proper decryption key is employed.[2]
End-to-end encryption is widely utilized in messaging platforms, voice and video conferencing tools, and file transfer services. However, it does not automatically safeguard metadata, vulnerable devices, or messages kept outside the encrypted communication system.
E2EE plays a crucial role in safeguarding digital privacy and the security of online exchanges.[3]
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