Broadcast and Trace with (N^{varepsilon }) Ciphertext Size from Standard Assumptions

Rishab Goyal
Rishab Goyal
Willy Quach
Willy Quach

ADVANCES IN CRYPTOLOGY - CRYPTO 2019, PT III, pp. 826-855, 2019.

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Abstract:

We construct a broadcast and trace scheme (also known as trace and revoke or broadcast, trace and revoke) with N users, where the ciphertext size can be made as low as O(N-epsilon), for any arbitrarily small constant epsilon > 0. This improves on the prior best construction of broadcast and trace under standard assumptions by Boneh and Wa...More

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