Guido @DecodeSignals
Monitoring, decoding and analysing of digital radio signals on all frequencies, Ham radio operator Joined December 2017-
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8195 kHz - Romanian Special Telecommunications Service exchanging zipped test mails between Bucharest and Bacau using MIL-110A / STANAG-5066
5874 kHz - NATO exercise, Dutch mil voice and text MIL-STD188-110A / FED-STD-1052 Recording: disk.yandex.com/d/3HB5H-H5CRT8…
11500 kHz - US DoD sending IPv4 packages secured by ESP protocol using MIL-110A and STANAG-4539 with STANAG-5066 Recording: disk.yandex.com/d/hUDEqOrVGP8u…
5094 kHz - Polish Mil sending HF mails (HBFTP zip files / MIL-STD188-110A / STANAG-5066 / Harris equipment)
15896.5 kHz - 1200Bd Packet Radio / AX.25 transmissions with TCP/IP packets during the last days. Callsigns were HQ2CEN and CE4TST. The file header in each transmission is showing a JPEG (JFIF) structure. Recording: disk.yandex.com/d/GvxdEsfYZ3qO…
4744.5 kHz - Norwegian Navy stations LBJ and 3KD trying to send messages using STANAG-4481-PSK with KG84 encryption. But no success, even after confirming the use of "national crypto" several times. Recording (voice and data): disk.yandex.com/d/EuIP3eksP20O…
4485 kHz and 10608 kHz - (to me) unid periodic signal. Synched every 1.8s followed by eight slots of 200ms. Fragments of voice, mic feedback and MFSK-8 (ALE-2G ?) could be seen in the slots. Any idea ? Recording: disk.yandex.com/d/wpqHhBdhnDeY…
6668 kHz - Chinese mil / People's Liberation Army (PLA) with several 3-digit callsigns sending MIL-110A with HARRIS Citadel encryption. Recording: disk.yandex.com/d/6M4Fan0mtlvM…
4593 kHz - 1200Bd FSK / 850Hz shift, 1536-bit TDM protocol. TDoA points to UK, should be DHFCS. Recording: disk.yandex.com/d/fURdi3urB6po…
6828 kHz, 5437 kHz and other freqs (tonight) - ALE-2G calls 10CDGD, DGG01D and DGD01D followed by MIL-110A transmissions with KG-84 encryption. Any idea who it is ? Recording: disk.yandex.com/d/iA3Lh6e8BtaR…
4132 kHz and 4135 kHz - Swiss army with link protected ALE-2G and MIL-110A sending UUencoded and IDEA encrypted HF mails using FED-STD-1052 protocol. The IDEAkey is brand-new of 05.02.2021 Recording: yadi.sk/d/qx58I4rf8TMX…
7660 kHz - MIL-110A and STANAG-4539 with STANAG-5066 sending IPSec data packets. S5066 addresses belong to US DoD. IPv4 header and ESP protocol detected by the great tool #CyberChef - gchq.github.io/CyberChef and by Wireshark. Recording: yadi.sk/d/8BJ5ip4PPHRs…
6990 kHz - FSK ~76.7bd/300Hz, 5-bit text of PLATH with an innovative recruiting method. career.plathgroup.com Recording: yadi.sk/d/2PzAcMV-NPzA… #PROCITEC @shoc_rolf
12180 kHz - unid MIL-110A transmissions, 1200bps with 8N1 framing. Very regular bit pattern. Don't know yet if it's encrypted or not. Recording: yadi.sk/d/i5rBBMveZGts…
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6884 KHz/USB: Polish AF using R&S GM2100 proprietary waveforms as HF bearer and UUCP over RSX.25 to send PostMan II email messages... i56578-swl.blogspot.com/2023/07/polaf-…
Surprising one-way Pactor-I activity this morning on 7603 kHz USB - The operator continuously sent the 68 bytes string of the anti malware "Testfile" from EICAR - TDoA source points Benelux area - 50Hz hum present voca.ro/12GLCyjIDi5S
a bit of #SIGINT #OSINT about Taiwanese Navy HF email messages exchange i56578-swl.blogspot.com/2022/05/1016-p… @DecodeSignals @DF3LZ @ik1yde @shoc_rolf
3G-HF (STANAG-4538): looooong FLSU async call just like the good old 2G ALE. Linking protection is used.
Russ MIL datalink using 69 & 117 bit frames: [2 start + 48/96 data + 1 sep + 16 EDAC + 2 stop] data blocks can be descrambled by polynomial x^13+x^9+x^7+1 into payloads of the same length (13 bits), more precisely 35/83 bits of zeros + 13 bits of data. i56578-swl.blogspot.com/2022/03/1200bd…
@India_Papa_Golf @DecodeSignals 16000 too and btw, TDoA give G (most likely Barford St John TX site) & East MED/CYP for the warship
Since a few days UK DHFCS is running the Aus MHFCS 600Bd/850 MSK (KW-46 secured) bcast from St. Eval on 2815.0 KHz (before occupied by the usual STANAG-4481F). Don't know if it has something to do with the recent agreement between UK, Australia and USA... disk.yandex.com/d/BXLEeV10tp7g…
Today I saw test transmissions. The transmission was carried out by means of STANAG-4285 600S (start-stop code 8-30). Apparently, it was a RapidM TC4 HF Modem & ALE Controller. link to the manufacturer, maybe someone will be interested. rapidm.com/product/tc4-lf…
Tur-Mil 300Bd/400 & 1200Bd/800 FSK. Notice the presence of the 64-bit KG-84/KIV-7 sync sequence. disk.yandex.com/d/zJojhrHMYi3Y…
Unid PSK8 2400Bd burst waveform spotted on 10557.0 KHz (CF) by using OZ1AEF KiwiSDR (Denmark). ACF value is 293.4 ms, that makes a period length of 704 tribit on-air symbols or 2112-bit length frames. disk.yandex.com/d/s8BveGOqLx_s… @India_Papa_Golf @DecodeSignals @DF3LZ @ik1yde
a bit of analysis and #SIGINT about the OSBiH HF network on 5120 KHz/usb i56578-swl.blogspot.com/2021/09/analyz… @DecodeSignals @India_Papa_Golf @DF3LZ
...and (as expected), ARQ frames and the physical link break at the end of the transfer
...just to clarify my previous tweet: after the physical link has been requested & accepted (notice the address change), STANAG-5066 DTS sublayer starts to send encapsulated C_PDU data. Output text is from (my) STANAG-5066 dissector 😄
[2/2] ...In this sample (Serbian-Mil transmissions), anyway, data are sent using M-39, ie outside S5066: so the use of S5066 seems a "standard" way to operate.
[1/2] Before data forwarding, STANAG-5066 needs to access the physical channel, i.e. the radio spectrum, assuming that the frequency selection is handled by an external process such as ALE...
async 8N1 FSK 1200Bd/850 bursts carryng the same contents, spotted on 7531 Khz (cf) using Aichi KiwiSDR (Japan) takeradio.asuscomm.com:8073/?f=7529.00usbz…
@i56578_swl Active on 19102.0 cf atm - System is most likely from Busan city area, South Korea ... and it's still transmitting the same data over & over
9921.0 KHz/usb (around 0730z), ALGERIAN AF: Cheraga HQ (COF) to Blida Air Force Base (CM1), sending HARRIS "Citadel" encrypted message using async 8N1 framing and 188-110A ST as HF waveform
11011.0 KHz/usb Bulg-MFA sending encrypted msgs using RFSM-8000 modem. It may happen to mixup RFSM and 188-110 Serial waveforms (unless the initial 300ms pilot tone of the former) since they have the same ACFs, however they have different framings. disk.yandex.com/d/1bAjHVn45UYN…
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