The Stream Cipher Edon80. Edon80 is a hardware binary additive synchronous stream cipher. It’s properties are: 1.) The internal structure is highly pipelined; 2.) It is highly parallelizable, making it scalable from the speed of processing point of view; 3.) Its design principles offer possibilities to achieve significant speed asymmetry — it belongs to a family of stream ciphers that in hardware can have a constant speed of one bit per clock cycle, but in software implementation on popular modern CPUs can be made as slow as needed. Since its first description in 2005, it has been analyzed by several cryptographers, have been implemented in a more compact way and a MAC functionality have been added. We give a full description of Edon80 including latest developments and updates.