The High-Definition Audio-Video Network Alliance was a cross-industry collaboration of members addressing the end-to-end needs of connected, HD, home entertainment products and services. The organization was formed by leading companies from the four industries most affected by the HD revolution: content providers, consumer electronics, service providers and information technology. HANA worked to create design guidelines for secure high-definition audio-video networks that would speed the creation of new, high quality, easy to use HD products. HANA membership was open to all companies involved in the digital entertainment industry. HANA was dissolved in September 2009 and the 1394 Trade Association assumed control of all HANA-generated intellectual property.
Overview
HANA was incorporated in October 2005 and formally launched in December 2005. HANA's mission was to provide consumers with a simple way to connect and enjoy HD entertainment anywhere in the home. The organisation's goal were to create standards-based solutions to facilitate commercial deployment of connected products and services that would enhance the consumer HD entertainment experience.
Eight major consumer electronics manufacturers in 1997 came up with an open standard enabling home entertainment devices to communicate intelligently with each other. The HAVi standard promised to bring true platform independent interoperability to consumer devices using high bandwidth IEEE 1394 as the connecting medium. The manufactures, namely Grundig, Hitachi, Panasonic, Philips, Sharp, Sony, Thomson and Toshiba along with now over 30 other participants, had formed a non-profit organization called HAVi for promoting the development of interoperable consumer products. The goal of HAVi organization is to provide a standard open architecture for intelligent audio and video devices to interoperate with each other regardless of manufacturer, operating system, CPU or programming language used for implementation. The first beta version of the HAVi standard version 1.0 was published in December 1998 while the final 1.0 version was released in December 1999. The current version of the specification is 1.1 and it was published in May 15, 2001. Only a few HAVi-capable products were ever sold; none of the founders of the consortium pursuits the standard anymore.
Content protection
HANA uses content protection developed in conjunction with IBM, a HANA member, called Advanced Secure Content Cluster Technology. ASCCT content protection is based on broadcast encryptionkey management and AES 128 for distribution and storage. ASCCT was designed specifically for home networks. Devices connected on a HANA network are cryptographically bound to each other to create an “authorized domain”, with each domain receiving its own unique ID. All devices that are members of this domain share certain cryptographic secrets allowing them to act in many ways, as if they are a single device. When content is received into the authorized domain, it too is bound in that only authorized members of the domain will have the keys to decrypt it. If a copy were to be given to a non-authorized device, it would not be able to decrypt it, rendering the copy useless. Moreover, devices may only be a member of a single domain and they may only play content that is bound to that domain. This avoids any situation where a device is loaded with content on one network and then moved to another. To share content, it must join the new network at which time its keys from the original domain are destroyed and the content rendered unreadable. ASCCT, as implemented by HANA, is a peer-to-peer solution. There is no central device that maintains the decryption keys or the library of content. Therefore, there is no central failure point as there is for many other solutions such as a cable STB PVR or a PC. It is based on broadcast encryption, the same basic technology used in 4C and AACS content protection. Similar to AACS, a compromised device or class of devices is repairable by revocation of device the keys which can occur any time new content is imported into the domain, or a connection is made to a content service. Further, content can be pre-encrypted with ASCCT by provider or delivered using a proprietary content protection which is then can transcrypted to ASSCT using the built-in secure encryption engine in HANA devices. A benefit of this approach is that it supports managed copies of content distributed by DVD, On-Demand services, downloads from the Internet, etc. Perfect copies of a movie can be stored on any or all devices within the domain without fear the copies will be distributed outside the domain. Portable devices can be disconnected and still play the content, yet if they are connected to another device or network, any copy left behind cannot be used. The decryption keys remain with the authorized device.
Industry alliances
HANA worked with several leading organizations to realize its vision of a trusted, easy-to-use home entertainment network that enhanced the consumer HD experience. HANA did not create specifications; instead it worked with existing standards and developing design guidelines to incorporate best in class technologies. HANA worked with organizations such as the 1394 Trade Association and CableLabs.
