Taking daily averages, stutter decreased 6-10% for the BBR group. Bandwidth increased by 10-15% for the slower download cohorts, and by 5-7% for the median. There was no difference in latency between groups.
Savitech provides USB audio drivers for a number of specialized audio products. Some versions of the Savitech driver package silently install a root CA certificate into the Windows trusted root certificate store.
Mitre assigned this exposure the identifier CVE-2017-9758, but was initially tracked by HITCON ZeroDay project as ZD-2017-00386.
有兩把 CA public key 被塞進去。雖然目前還沒有徵兆 private key 有外洩，但還是建議儘快移除：
There is currently no evidence that the Savitech private key is compromised. However, users are encouraged to remove the certificate out of caution. The two known certificates are:
SaviAudio root certificate #1
Validity: Thursday, May 31, 2012 - Tuesday, December 30, 2036
Serial number: 579885da6f791eb24de819bb2c0eeff0
SaviAudio root certificate #2
Validity: Thursday, December 31, 2015 - Tuesday, December 30, 2036
Serial number: 972ed9bce72451bb4bd78bfc0d8b343c
另外 Savitech 也放出了新版的 driver，不包含 Root CA：
Savitech has released a new driver package to address the issue. Savitech drivers version 220.127.116.11 or later do not install the root CA certificate. Users still must remove any previously installed certificate manually.
看了一下說明，看起來是當時為了支援 Windows XP 而做的，但微軟已經不提供驅動程式的數位簽章了，所以就只好這樣搞...
The basic MP3 decoding and encoding technology is patent-free in the European Union, all patents having expired there by 2012 at the latest. In the United States, the technology became substantially patent-free on 16 April 2017 (see below).
If the longest-running patent mentioned in the aforementioned references is taken as a measure, then the MP3 technology became patent-free in the United States on 16 April 2017 when U.S. Patent 6,009,399, held by and administered by Technicolor, expired.
The three exceptions are: U.S. Patent 5,878,080, expired February 2017; U.S. Patent 5,850,456, expired February 2017; and U.S. Patent 5,960,037, expired 9 April 2017.