danog/system-bus-radio
1
0
Fork 0
mirror of https://github.com/danog/system-bus-radio.git synced 2024-12-02 20:57:44 +01:00
Code Issues Projects Releases Wiki Activity

Clarify _mm_stream_si128

Browse Source
This commit is contained in:
William Entriken 2016-03-01 11:29:27 -05:00
parent ec00d941a1
commit b09a87a9da
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -38,6 +38,8 @@ The actual emissions are caused by the `_mm_stream_si128` instruction that write
> Guri, M., Kachlon, A., Hasson, O., Kedma, G., Mirsky, Y. and Elovici, Y., 2015. GSMem: data exfiltration from air-gapped computers over GSM frequencies. In 24th USENIX Security Symposium (USENIX Security 15) (pp. 849-864). > Guri, M., Kachlon, A., Hasson, O., Kedma, G., Mirsky, Y. and Elovici, Y., 2015. GSMem: data exfiltration from air-gapped computers over GSM frequencies. In 24th USENIX Security Symposium (USENIX Security 15) (pp. 849-864).
Please note that replacing `_mm_stream_si128` with a simple `x++;` will work too. My experience has been that `_mm_stream_si128` produces a stronger signal. There may be other ideas that work even better, and it would be nice to improve this to be more portable (not require SSE extensions).
The program uses square wave modulation, which is depicted below: The program uses square wave modulation, which is depicted below:
``` ```