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Explore the multi-user security of GCM, the most widely used dedicated AE mode, in this 21-minute conference talk. Delve into new concrete security bounds that improve upon previous work by examining the impact of nonce re-use across users and re-keying. Analyze the refined parameterization of adversarial resources, investigate tight bounds for nonce randomization, and compare the findings with existing research. Gain insights into proving bounds and understand the implications for the security of GCM in multi-user environments.
