TimePictra®プラットフォームとBlueSky™ GNSSファイアウォールによるPNTインフラの保護

[Music] today we will discuss some of the data and anomaly detection features provided by the time picture 11 software in conjunction with the blue sky gnss firewall this is the Blue Sky gnss firewall it protects Downstream systems from gnss spoofing or jamming attacks gnss signals are inherently fragile signals that are capable of being jammed and or spoofed in an effort to mitigate the jamming and spoofing possibilities on critical Timing Systems these systems and the signals being received by the systems are carefully surveyed the surveillance of these signals allows for added visibility in the data that is being passed through these signals which in turn increases the level of security for the critical Timing Systems that rely on gnss signals fortunately microchip technology has developed both software and Hardware that allow for advanced surveillance into received gnss signals the software solution is called Time picture 11 and is capable of monitoring and comparing data collected by systems deployed across the globe when the software is paired with the proper Hardware such as the Blue Sky gnss firewall many existing gnss timing based systems that have previously been vulnerable to attacks are instantly granted level five security this means that when paired together Time picture 11 and the blue sky gnss firewall are able to detect anomalies around the world in real time while while performing Advanced analysis of live Sky signals now let’s take a look at the software time picturer 11 this instance of Time picture 11 already has several firewalls that have been deployed across the world integrated into it as can be seen on the list on the left hand side of the screen by selecting topology the view of the firewall locations can be seen on a map selecting performance and then selecting Blue Sky shows a list of available Blue Sky gnss firewalls in the window below from there the firewalls can be selected in this example let’s select Boulder and then select next and now we have access to plot many different data points that have been received by the firewall first let’s take a look into the visibility of timing anomalies although gnss is widely known for its use in navigation it is completely dependent on timing accuracy in an effort to determine if a gnss signal is performing well measurement of the phase difference between the expected versus received phase is analyzed under normal conditions the phase offset should be in the plus to minus 50 nond range anomalies in timing can be gradual or sudden and can be quite complex this small range in tolerable phase off set allows for detection of timing anomalies one of the most important techniques for protecting against gnss attacks when not detected this can cause serious errors and confusion in critical Downstream systems that rely on a valid gnss signal as can be seen by the plot on screen the data that’s being received by this specific firewall Falls well within the range of 50 to positive 50 NS because of this no suspicious activity involving the phase time deviation is suspected to be occurring in the gnss signal being received by this firewall now let’s take a look at what a spoofing attack might look like in the phase time difference the FaceTime difference starts at zero rapidly spikes up to 150 NS and then goes back down to zero again the value spikes up exceeding 150 NS and then goes back down to zero these rapid spikes and extreme changes in FaceTime difference indicate that something is occurring within the system it could be jamming spoofing or a bad connection when this is detected the firewall and Time picture will alert the user that anomalous conditions have occurred next let’s take a look into the visibility of position anomalies in critical infrastructure applications an antenna receiving gnss signal is typically in a fixed location ideally in a known and surveyed position with a clear view of the sky the position and the location of the antenna is essential for accurate timing performance offset in the position of the antenna can cause degraded timing performance essentially resulting in the loss of satellite tracking the plot on screen shows the position deviation versus time being received by the firewall some deviation is suspected and it can be seen that the blue line is around the range of 10 to 15 M which is typical and well below the redline threshold of 30 m if the system exceeded the threshold of 30 m it would alarm and alert the [Music] users now let’s take a look at what an anomaly in the position deviation would look like as you can see the position deviation starts as slightly under 10 m which is typical exceeds past 40 m back down to 10 m back up to 40 m and then back down to about 10 m every time that this line crosses that red threshold line the user is going to be alerted that an anomaly has been detected in the system finally let’s take a look into the visibility of spoofing although the signal has been manipulated and is no longer valid spoofing attacks can be difficult to detect since there is still a gnss signal spoofing is an Ever ongoing and evolving threat that requires a defense system that can be upgraded to meet new and emerging threats satellites coming into view or going out of view very rapidly is one sign that spoofing could be occurring as can be seen in the plot on screen the number of tracked satellites being received by the Blue Sky gnss firewall is within the typical range of 7 to 10 satellites the red line at the bottom of the plot is the threshold of satellites that are required to be connected for a valid signal this threshold is set to four and the blue sky firewall is receiving more than four satellites continuously it’s also important to note that the number of satellites does not rapidly change and this data looks to be valid data let’s take a look at what an anomalous situation involving the tracked satellite count might look like the track satellite count is constant six dips down to five back up to six down to four and eventually down to zero satellites detected relatively rapidly this indicates that something is likely going on with the system an anomaly has been detected and the system administrator would be alerted in conclusion security is the most important requirement for critical infrastructure operations and this is the focus focus of Time picture and the blue sky gnss firewall there are many different aspects in the gnss signal that can be interrogated by the firewall and Time picture this analysis provides information as to if the problem detected by the system is specific to the location or affecting a larger geographical area the added visibility from Time picture and the blue sky gnss firewall allows operators to take a quick and costeffective action to protect the critical system systems to learn more about the Blue Sky gnss firewall Time picture 11 or our other timing anomaly detection Solutions please visit microchip.com

全地球衛星測位システム（GNSS）の脆弱性が増加する中、Microchip社のTimePictraプラットフォームとBlueSky GNSS Firewallは、GNSS受信品質を監視し、軽微な障害が深刻な停電に拡大するのを防ぐための堅牢なソリューションを提供します。このシステムにより、インフラ事業者はGNSSの脆弱性が局地的なものなのか、より広い地域に影響を及ぼすものなのかを特定することができ、迅速かつ費用対効果の高い対応が可能になります。
BlueSky GNSS FirewallシステムとTimePictraプラットフォームの使い方をご紹介するビデオチュートリアルをご覧ください。このチュートリアルでは、世界中のGNSS信号受信状況の包括的な概要を説明しています。位相時間オフセット、位置偏差、衛星数測定など、さまざまなGNSSメトリクスに関連するGNSS異常の監視、検出、分析方法に関するさまざまなシナリオが含まれています。