Difference between revisions of "Encryption"

Revision as of 10:54, 2 May 2012

Some notes on recording encryption.

Every recording made by the Humax is encrypted before being stored on disk;
The encryption key is unique to each box and believed to be stored in an on-chip Hardware Security Module (HSM);
Copying a standard definition recording to an external disk (connected via USB) results in the Humax decrypting the file in the process [HDR model only];
Copying a high definition recording to an external disk will NOT decrypt it;
The HDR features a built-in FTP server but this only provides access to the raw files on disk. If you download files from the Humax via FTP, they will remain encrypted;
The HDR features a built-in DLNA media server which serves decrypted content to DLNA clients. However, it will only stream high definition content to clients that negotiate Digital Transmission Content Protection (DTCP);

If you install the custom firmware and install the right packages, then:

High definition recordings can be treated in the same way as standard definition, i.e. decrypted on copy to external disk and streamed without DTCP;
Decryption on copy can be achieved with a virtual disk (much faster);
Recordings can be automatically decrypted in-place as a background task;
Selected recordings can be decrypted in-place via the web interface;
The HDR software can be temporarily loaded onto the HD in order to decrypt recordings.

The steps required for decryption are detailed below:-

Note:- DLNA working requires Content Share = on

In Menu Settings >> System >> Internet Settings

@@ Line 3: / Line 3: @@
 === Stock firmware ===
-*Every recording made by the Humax is encrypted before being stored on disk;
+*'''Every''' recording made by the Humax is encrypted before being stored on disk;
 *The encryption key is unique to each box and believed to be stored in an on-chip Hardware Security Module (HSM);
 *Copying a ''standard definition'' recording to an external disk (connected via USB) results in the Humax decrypting the file in the process [HDR model only];