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What is Bounds on Ad Hoc Threshold Encryption about?

This research paper explores theoretical bounds on the ciphertext size of ad hoc threshold encryption (ATE) schemes. The authors show that: 1) With access only to idealized two-party key exchange, any secure ATE scheme must produce ciphertexts of size at least (n - t - 1)l, where n is the number of recipients, t is the threshold, and l is the message length. 2) If access to an idealized pseudorandom generator is also provided, the lower bound on ciphertext size becomes d(n-t)/2eλ + l, where λ is the leng

Author

Ajith S

Language

EN