Rosario Gennaro Jonathan Katz Hugo Krawczyk Tal Rabin Secure Network Coding over the Integers. 142-160 2010 Public Key Cryptography http://dx.doi.org/10.1007/978-3-642-13013-7_9 conf/pkc/2010 db/conf/pkc/pkc2010.html#GennaroKKR10