中圖分類號： TN914；TP309.7
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.200857
中文引用格式： 國佃利，楊鵬飛，劉家磊，等. 具有固定長度密文的廣播加密方案[J].電子技術(shù)應(yīng)用，2021，47(9)：55-58.
英文引用格式： Guo Dianli，Yang Pengfei，Liu Jialei，et al. Broadcasting encryption scheme with constant ciphertext overhead[J]. Application of Electronic Technique，2021，47(9)：55-58.

Broadcasting encryption scheme with constant ciphertext overhead

Abstract： Broadcasting encryption enables to establish a secrecy channel for distributing ciphered messages, the broadcaster adaptively chooses the set of authorized users before executing encryption operation, and only the authorized users could decrypt the received ciphered broadcast. This paper devises a public key broadcasting encryption construction with prime order asymmetric bilinear maps and proves it is static secure in the standard model. In the proposed construction, the overhead of ciphertexts and user secret keys are O(1), the public key overhead is O(N) in the total user number N. Compared with other related constructions, the proposal achieves static security based on non-interactive security assumption with the optimal overhead of ciphertexst and user secret keys.

Key words : broadcasting encryption；standard model；static security；overhead