Cult of the dead cow, creators of infamous���Ъ�����A�гy��W�L�� BackOrifice software backorifice�n�� , released a secure, user-friendly, free, open source instant messaging software to facilitate anonymous communication and secure file transfers. �A�o���F�@�Ӧw���A��K�A�K�O�A�}�񷽥N�X���Y�ɳq�T�n��A�H��K�ΦW�q�H�M�w�������ǿ�C

ScatterChat scatterchat is designed to facilitate secure and private real-time communication over the Internet.�ت��b��P�i�w���M�p�H����ɳq�H�A�H�۰�ڤ��p���C

It provides message encryption support over AOL, Yahoo!�����Ѫ��H���[�K�����AOL �A����I & MSN. ����MSN �C Additionally it provides file encryption support over MSN network.���~�A�����ѤF���[�K���MSN�����C

ScatterChat is is intended for non-technical audience. scatterchat�O�N�b�D�޳N�ʪ��[���C It provides end-to-end encryption over the Tor network.�����Ѻݨ�ݪ��[�K�W�LTor�����C Its security features include resiliency against partial compromise through perfect forward secrecy, immunity from replay attacks, and limited resistance to traffic analysis, all reinforced through a pro-actively secure design.�䨾���S�x�A�]�A�u�ʹﳡ������A�q�L�����۫O�K�A�K�������A�M�������ܬy�q���R�A�Ҧ���A�q�L�n���D�ʪ��w���]�p�C

According to lead developer J. Salvatore Testa II, ��The anonymity and encryption that ScatterChat provides ensures that both the identities and messages of activists remain a mystery, even to well-funded totalitarian governments.���ڲv��}�oj.�ĺ��˦h�ؤG�A �����@�z�S�m�W���M�[�Kscatterchat�W�w�A�T�O��誺�����M�l�󪺬��ʮa���M�O�@�����A�Y�ϸ���R�������v�F���� �C

ScatterChat uses 2048-bit ElGamal and 1024-bit DSA for encryption setup and authentication. scatterchat�ϥ�2048�줸��ElGamal�M1024�쪺DSA�[�K���w�˩M�{�ҡC For each new conversation, ScatterChat generates a new 256-bit AES message key, a 256-bit SHA-1 HMAC key, a 256-bit nonce, and a 256-bit AES file transfer key.���C�ӷs���|�ܡA scatterchat�ͦ��@�ӷs��256��AES�T��������A�@��256�쪺SHA - 1 hmac������A�@��256�쪺NONCE �A�M256��AES���ǿ骺����C It is immune to replay attacks, supports Perfect Forward Secrecy, and features limited message deniability properties.�o�O�K�̭�������A����۫O�K�A�è㦳�������T��deniability�ݩʡC

Any one-to-one communications mechanism can be secured including most client/server systems and VoIP systems.����@��@���q�H����i�H�T�O�]�A�j�����Ȥ��/�A�Ⱦ��t�ΩMVoIP�t�ΡC

Note:�`�N�G Cult of the dead cow���Ъ����� is a well-known international group of hackers and computer security experts.�O�@�ӵۦW����ڶ��Ϊ��«ȩM�q���w���M�a�C