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The document summarizes research into the security of Diffie-Hellman key exchange as used in popular internet protocols. The researchers find that in practice, Diffie-Hellman offers less security than believed for two reasons: some servers use weak parameters or support obsolete crypto, and precomputation attacks allow breaking connections using standardized groups. The researchers implemented precomputation attacks against 512-bit groups used by over 90% of vulnerable TLS servers, allowing decryption of ov

Author

Saurav Jajodia

Language

EN