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Showing posts with label Citadel. Show all posts
Showing posts with label Citadel. Show all posts
30 August 2024

Citadel II encryption in sync/async MS-110A transmissions (Algerian AF)

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Altought it was introduced in 2004 [1], so far I had always seen the Citadel II encryption algorithm occur in 3G-ALE/STANAG-4538 contexts wh...
5 June 2023

Harris Citadel II secured transmissions, 12/32 bytes length IVs

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Continuing the monitoring and analyzing the receivable signals around 7 MHz band, I am increasingly convinced that the Harris Citadel II is ...
29 May 2023

Harris Citadel II secured traffic?

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For some days now I have been dedicating some time to monitoring the 6.8-7.1 MHz band where it is possible to receive several STANAG-4538 (3...
24 December 2017

a MS-110A modem running in ASYNC mode

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This is a sample of MIL-STD 188-110A Serial 75bps/L modem working in ASCII ASYNC mode and transporting a Citadel encrypted file. The trans...
3 August 2017

short bit-analysis of a STANAG-4538 LDLn transfer (BW3 bursts)

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Each LDLn transfer consists of a TX Frame consisting of one data packet; A data packet is defined as a fixed-length sequence of n-byte ...
2 April 2017

xDL PDUs, BW2 & BW3 waveforms, and Harris 'Citadel' encryption

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I spent some time to understand where and when the 'Citadel' encryption is applied to a message in the STANAG-4538 xDL implement...
20 March 2016

STANAG-4285 running in ASYNC mode

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A lthough a bitstream analyzer recognizes physical or data-link layer protocols by matching known patterns and sequences, it isn't s...