Definition ∞ Key exchange protocols are cryptographic methods that allow two or more parties to securely establish a shared secret key over an insecure communication channel. This shared key is then used to encrypt subsequent communications, ensuring confidentiality. These protocols are foundational for secure online interactions and digital asset transactions. They prevent unauthorized access to sensitive information during data transfer.
Context ∞ The security of key exchange protocols is a constant area of research and development, particularly with the advent of quantum computing threats. News in cryptography frequently discusses advancements in post-quantum key exchange to protect future digital communications. Weaknesses in these protocols can lead to significant security breaches in digital asset systems and other online platforms.
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