With the rapid development of information and network technologies, communication security has become an important issue in many applications. There are many public-key based encryption schemes proposed in the literature. Network applications are no longer just one-toone type of communication; but it involves multiple receivers (>1) (e.g., multicast transmission). One-to-one type encryption is no longer satisfying this type of applications. Ghodosi et al. proposed a threshold RSA cryptosystem in 1996. Their scheme is also called a multireceiver encryption. In Ghodosi et al.’s scheme, each receiver’s decryption key depends on all public keys of receivers. When the number of receivers is large, Ghodosi et al.’s scheme becomes impractical. We proposed a novel anonymous multi-receiver encryption. In our scheme, each receiver’s decryption key is fixed. In addition, the scheme provides anonymity of receivers. We include performance analysis and comparisons with other schemes.
['Lein Harn', 'Chin-Chen Chang', 'Hsiao-Ling Wu']
An Anonymous Multi-Receiver Encryption Based on RSA