On the blue toolbar under the logo, float your mouse over Wiki and click on Radio Models (Note that anything in blue is a link). The P25 Threshold is a kind of digital squelch setting. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. See if there is a selection in the Tone column in FreeSCAN for Search, which should make the scanner display whatever NAC it receives. There are several ways to listen, like through iTunes, a phone, or your web browser. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. DSD+ can be downloaded from this megaupload link. Find Solution Command Centre Back Command Centre. You need 2 because you want one tuned into the control channel and one bouncing around on the trunked channels. To get started, you’ll need a. Best case scenario you need to look at using software like DSD+ with your RTl SDR dongle. P25 AES256 Encryption Audio Sample X311Spartan 1. There are some references to breaking encryption on a P25 system that I have come across. Understand P25, the physical layer and the messages being passed over the air. Encrypted Police Scanners Are Raising Big Questions. The RTL-SDR software defined radio combined with SDRSharp and a program called “digital speech decoder” (DSD) can be used as a radio scanner to easily and cheaply listen to unencrypted digital radio voice conversations. A channel or group is programmed to use encryption and a key is loaded into each radio that uses that group. Make sure that the decoder knows where the JMBE Audio Library is (I believe you have to point it to the directory, but you may be able to download it automatically from this screen). This has become a mission crit-ical component in the fight against terrorism and advanced encryption systems like AES are being deployed in P25 digital wireless communication systems. Enabling P25 encryption is easy. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. Listening to Encrypted Police Frequency on a Radio Shack PRO 197 Digital Trunk Tracking Scanner. Understanding the legal basis for decrypting P25 encrypted traffic being illegal. The first part of the video (TG 20001) is what a P25 Phase II encryption sounds like. Subscribe to the Magazine Preparation Survival Transportation Gear Newsletter Magazine FAQ Search Subscribe to the magazine. Listening to my local police, using P25. Speaking of illegal, some say we break 3-4 laws per day so. Show more Almost yours: 2 weeks, on us. Listening to Encrypted Police Frequency on a Radio Shack PRO 197 Digital Trunk Tracking Scanner. dll into the same folder as the dsd. An audio sample from a weak P25 sample can be found here for DSD+, and for comparison here for the old DSD. Digital radio voice communications are. The A-side is used to help program the channels on the radio. Scanner Radio Encryption, Can I listen to encrypted. 7K views 3 years ago This is what AES256 encryption sounds like over P25 using a. The P25standard calls out specific modes of operation forload-. How To Listen To Encrypted P25?. However, P25 can unscramble trunked radio calls intercepted. In short, he is capturing police radio and decoding the encrypted p25 audio by using a software defined radio. Since the interface is a web interface, you could probably run this on a small computer on the network and then access it. listening: What cops need to know about. The scanner does not mute it like it does on P25 Phase I. This is determined solely by the “System Type. you will need to place an MP3 encoder file lame_enc. To listen to encrypted DMR, you would also need the decryption key. Scanner Radio Encryption, Can I listen to encrypted communications on my scanner radio Steve St Denis 618 subscribers Subscribe 31K views 2 years ago FORT ERIE An explanation of if you can. Fire & EMS are in the clear using digital P25. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio that’s programmed with the encryption key. Some municipal areas are upgrading to P25 Phase 2 so almost gone are the days that you can track them with a police scanner since P25 is a Trunked Radio system and not just a lone frequency to monitor. Security Weaknesses in the APCO Project 25 Two. Occasionally police departments with encrypted systems will provide a system radio with basic talkgroups to media, wreckers, neighboring agencies and others that might have a legitimate need to monitor them. Theres three variants in the Menu to help for the novice, the intermediate, advanced users, at least try to enable a bit better decoding than standard Auto settings. 7K views 3 years ago This is what AES256 encryption sounds like over P25 using a Motorola XTS5000. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio that’s programmed with the encryption key. If you take a look at some of the GNU builds then you will see an option for adding the KEY to decode the P25 transmissions. looking for resources/info to decrypt ~~police scanners~~ encrypted. The Programming data on the B side will not be saved. The most common digital speech codec is APCO P25, which DSD is able to decode. P25 AES256 Encryption Audio Sample X311Spartan 1. Any talkgroups encrypted cannot. How to listen to encrypted police radio – The best way to do it!. The National Association of Police Organizations, which lobbies on behalf of police and police unions, supports letting local agencies individually decide whether or not encryption “is appropriate for their local needs,” said NAPO’s Stephanie Gessner in an email. If you want to know more about these scanners, use our wiki as a starting point. Tutorial on Setting up OP25 for P25 Phase 2 Digital Voice. P25 encryption = generic term for Motorolas form of encryption. If its truly encrypted voice your ability to crack the crypto is probably going to be quite an undertaking. With a $32 Software Defined Radio (SDR) and free software anyone can listen to P25 trunked control channels and log/record unprotected signaling. Most agencies can’t afford the AES encryption option, so they go with DES and therein lies the weakness of their set-up. Public access to Honolulu police and fire scanners to end. An anonymous reader writes Two Australian security researchers, Stephen Glass and Matt Robert, have published a paper that details flaws in the encryption implementation (PDF) in the APCO Project 25 digital radio standard, used by emergency services and police departments world-wide. Private LTE Unified Communications Unified Communications DIMETRA™ Express Migrate to DIMETRA™ Express to secure reliable communications and maxmise your ROI Book a consultation Find Solution Explore our new solution finder and find the best communication solution for your business. The P25 Motorola system is encrypted and provides more security to first-responder agencies ; it provides improved geographical coverage and building penetration, allowing HFD personnel to. Make sure that the decoder knows where the JMBE Audio Library is (I believe you have to point it to the directory, but you may be able to download it automatically from this screen). Implement a decoder which takes P25 signals and produces a message stream. DSD+ claims to have improved decoding and audio quality capabilities. To get it you would need permission from the police. This file is not included with DSD+ due to licencing. Then he is piping that incoming signal into a p25 decoder, which then outputs the decoded audio to his speakers. Can You Listen To Police Scanners Encrypted? – LegalProX. This has rendered P25 Phase I scanning equipment that is not upgradable useless in receiving those agencies. First link is about what can be used as evidence against you. In order to actually program a trunked scanner based on that knowledge, you need to know three key pieces of information about the system before you start: System Type System Frequencies Talk Group IDs you want to hear All of this information is usually available from the database at RadioReference. In any event, ignore the “System Voice” line when you are trying to determine whether a system is P25 or not. The encryption key is necessary to decrypt the transmission and allow you to listen in. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. For anyone asking, youll need 2 RTL-SDRs and they are dirt cheap. Make sure that the decoder knows where the JMBE Audio Library is (I believe you have to point it to the directory, but you may be able to download it automatically from this screen). Note that, as in this example, APCO-25 can be a Voice type on a Motorola non “P25” system. In this video of a local oil refinery, all comms are encrypted. I’m amazed there are any trunked P25 systems that aren’t encrypted. The only way to listen to the encrypted P25 traffic is with a legitimate radio, programmed by the radio network administrator. Frequency went P25e and not sure what I need to enter>Frequency went P25e and not sure what I need to enter. With a lost or stolen radio, your adversaries can lift encryption keys and listen in on your private communications. This thread is archived New comments cannot be posted and votes cannot be cast 2 34 Related Topics. Encrypted Radios: Off Grid Comms Offers AES-256 Encryption for Civilians / RECOIL OFFGRID Off Grid Comms offers ready-to-use encrypted radios for civilians. DES uses a 56-bit encryption key and AES uses a 256-bit encryption key. The first part of the video (TG 20001) is what a P25 Phase II encryption sounds like. With a $32 Software Defined Radio (SDR) and free software anyone can listen to P25 trunked control channels and log/record unprotected signaling. Software like SDRTrunk and DSDPlus. Good luck with your research RadioGuy3007 Member Database Admin Joined Jan 27, 2013. 0:00 / 2:47 AES256 Encryption - DMR Radio RFI-Crypto Lab 373 subscribers Subscribe 54K views 6 years ago This is a sample of how a DMR signal could be intercepted using software or another DMR. com Forums>P25 with AES and DES legality. They can be user programmed with up to 128 channels using the keyboard on the face or by computer software and have up to eight watts of transmit power. Extend the !WireShark sniffer to allow sniffing of P25 message. An audio sample from a weak P25 sample can be found here for DSD+, and for comparison here for the old DSD. The law mentioned in the third relates to sending devices via mail. Analyzing the various security issues and demonstrating the insecurity of P25 systems. The P25 Motorola system is encrypted and provides more security to first-responder agencies ; it provides improved geographical coverage and building penetration, allowing HFD personnel to. In this video I will show you how to use a $25 RTL-SDR to listen to police and fire department radio in your local area. P25 audio decode level adjustment. With a lost or stolen radio, your adversaries can lift encryption keys and listen in on your private communications. ” If there is P25 Voice on a. Gotta have a key swap with the network to open the encryption. I would like to listen to Law Dispatch, But as you can tell P25 (Encrypted). The 4 Best Free Police Scanner Apps. and various (unauthorized) users can listen in to law enforcement orotherprivate communications. The most common digital speech codec is APCO P25, which DSD is able to decode. With the right software an SDR is a powerful analysis tool for debugging and monitoring of P25 networks. Show more Almost yours: 2 weeks, on us 100+. Sounds like they arent running real encryption, yet. Broadcastify has given Blanton a clear view of the divide. Simple answerP25 Phase 2 can be monitored. Introduction to P25 Encryption. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. From the Alabama First Responder Network Phase. Most agencies can’t afford the AES. The same SDRs can receive and play unencrypted P25 voice, whether from a P25 conventional or trunked channel. As you probably know, P25 is where a voice signal is transformed into digital, which is a series of 0s and 1s. Find Solution Command Centre Back Command Centre Command Centre. The National Association of Police Organizations, which lobbies on behalf of police and police unions, supports letting local agencies individually decide whether or not encryption “is appropriate for their local needs,” said NAPO’s Stephanie Gessner in an email. Theyre based on the P25 digital standard with AES-256 encryption. But I just want to listen to the Police. The National Association of Police Organizations, which lobbies on behalf of police and police unions, supports letting local agencies individually decide whether or not encryption “is appropriate for their. 4 Best Free Police Scanner Apps. Hopefully we never see the day when all communications are Encrypted making our hobby of. Using the IFR 2975 for Advanced Project 25 Keyloading. GTR8000 NY/NJ Database Guy Database Admin Joined. ago If youre not given permission it is illegal. Real encryption doesnt use a key suitable for connecting Bluetooth headphones or locking luggage. That means conversations might jump from channel to channel. Tutorial on Setting up OP25 for P25 Phase 2 Digital Voice >Tutorial on Setting up OP25 for P25 Phase 2 Digital Voice. I would recommend a Uniden Homepatrol Series. Press okay and click the Playlist Editor button From there, flip over to the RadioReference tab and login using the account you created. Chesterfield County Sheriff and Richmond PD are all encrypted P25. how to use SDR to listen in on Police and Fire radio bands. OP25 is a program that decodes P25 Phase 1 and Phase 2 digital radio. To get started, you’ll need a digital two-way radio capable of decoding digital signals, an antenna, and some scanning software. An audio sample from a weak P25 sample can be found here for DSD+, and for comparison here for the old DSD. Most any of the recent digital trunktrackers can hear P25 just fine; however, the quality of the decoding varies between manufacturers. It can also be mixed in with analog channels on such a system. If you have a legitimate need to listen to the encrypted traffic, you can ask the agency that is managing the radio network to program a compatible radio. Press okay and click the Playlist Editor button. In this video of a local oil refinery, all comms are encrypted. Enabling P25 encryption is easy. However, encryption is an optional feature, and even radios equipped for encryption have the capability to operate in the clear mode. Understand P25, the physical layer and the messages being passed over the air. I’m amazed there are any trunked P25 systems that aren’t encrypted. This has become a mission crit-ical component in the fight against. P25 Phase 2 encrypted be decoded? : r/RTLSDR. What Im not clear on, and am asking on behalf of a local journalist, is what is the actual legal basis for prohibiting the decryption of. Cheshire Police and Fire Dispatch. Viewing the P25 Threshold levels on the Display Lets first make sure we have the P25 Level set option is set to Auto. com%2frtl-sdr-radio-scanner-tutorial-decoding-digital-voice-p25-with-dsd%2f/RK=2/RS=OtHxbB_2C9JNYnt8jTXaHGyV6wo- referrerpolicy=origin target=_blank>See full list on rtl-sdr. Second is about telecommunications companies making it easier for. Uniden BCD436HP P25 Phase II Encrypted Audio Sample. Pretty well all of the systems in major cities in Australia are now (or will be soon) encrypted, so I suppose enjoy it while. VSP is also on P25 with some limited encryption use. Super cheap software defined radios such as the RTL-SDR can be used to decode these digital voice communication signals instead of expensive radio scanners. If you take a look at some of the GNU builds then you will see an option for adding the KEY to decode the P25 transmissions. The 56-bit key is used by DES and the 256-bit key is used by AES. Scanner Radio Encryption, Can I listen to encrypted communications on my scanner radio Steve St Denis 618 subscribers Subscribe 31K views 2 years ago FORT ERIE An. To get started, youll need a digital two-way radio capable of decoding digital signals, an antenna, and some scanning software. APX™ radios are equipped with the security of the MACE chip. has been popular with other DVB dongle hacks. Well, that sounds like a lotta phooey, but some P25 systems are not encrypted, they just need to be decoded. Encryption, Can I listen to encrypted. I would like to listen to Law Dispatch, But as you can tell P25 (Encrypted). Im new when it comes to this new technology. It’s simple to enable P25 encryption. Listening to Encrypted Police Frequency on a Radio …. Here’s how you can do it properly. Software like SDRTrunk and DSDPlus can decode P25 Phase 1, but at the moment the only software that is capable of decoding P25 Phase 1 AND 2 is a program called OP25. Encrypted Radios: Off Grid Comms Offers AES-256 Encryption for Civilians / RECOIL OFFGRID Off Grid Comms offers ready-to-use encrypted radios for civilians. I understand a lot about SDR and P25 and encryption. Not the legality of decrypting encrypted traffic. Scanners will re-convert these 0s and 1s back into a. They can be user programmed with up to 128 channels using the keyboard on the face or by computer software and have up to eight watts of transmit power. Simple APCO P25 Phase 1 Decoder Plugin Released for SDR#. DSD is also capable of decoding other common digital codecs such as. OP25 is a program that decodes P25 Phase 1 and Phase 2 digital radio. DSD is also capable of decoding other common digital codecs such as DMR/MOTOTRBO, NXDN, D-STAR and ProVoice. P25 AES256 Encryption Audio Sample X311Spartan 1. The type of encryption to use depends on the type of information you’re protecting. Private LTE Unified Communications Unified Communications DIMETRA™ Express Migrate to DIMETRA™ Express to secure reliable communications and maxmise your ROI Book a consultation Find Solution Explore our new solution finder and find the best communication solution for your business. That means conversations might jump from channel to channel. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio that’s programmed with the encryption key. Not the legality of decrypting encrypted traffic. Click on the blue digital trunktrackers link and follow the instructions. The following sections will provide an overview of the features of encrypted P25, popular. You could enter the 110 NAC if you want, but its not necessarythe scanner should open up for any clear P25 transmission on that frequency with no NAC set. You could enter the 110 NAC if you want, but its not necessarythe scanner should open up for any clear P25 transmission on that frequency with no NAC set. Once you have Linux running, Docker makes the installation straightforward. build a police scanner for $30 >OP25 For Dummies. This is the sound of an encrypted signal on a P25, Phase II trunked radio system. It’s simple to enable P25 encryption. ago Ok thank u joshuamunson • 3 mo. Scanner Radio Encryption, Can I listen to encrypted communications on my scanner radio Steve St Denis 618 subscribers Subscribe 31K views 2 years ago FORT ERIE An explanation of if you can. A channel or group is programmed to use encryption and a key is loaded into each radio that uses that group. Software like SDRTrunk and DSDPlus can decode P25 Phase 1, but at the moment. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. There are several ways to listen, like through iTunes, a phone, or your web browser. Each radio that uses that group has a key that is loaded into it. Acting as the trust anchor, the MACE provides a secure environment for storing encryption keys via a hardened tamper-resistant chassis. The only way possible to hear an encrypted communication is with a properly programmed System Radio programmed with the encryption keys. An anonymous reader writes Two Australian security researchers, Stephen Glass and Matt Robert, have published a paper that details flaws in the encryption implementation (PDF) in the APCO Project 25 digital radio standard, used by emergency services and police departments world-wide. One BCD996P2 P25 Phase II scanner Raspberry Pi 3 running Darkice 30 foot antenna on elevation of 243 feet Connecticut public safety agencies are continuing to upgrade their radio equipment to P25 Phase II compliant hardware. Enabling P25 encryption is easy. and various (unauthorized) users can listen in to law enforcement orotherprivate communications. Best way to listen is to jam the encryption part of the radio which is probably illegal. It is a quick guide that shows you how to setup the software and find the. Improved Digital Voice P25 Decoding with DSD+. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. The units can monitor two channels simultaneously or scan through all the programmed channels. Why do police scanners go offline?. Link Layer Authentication and Link Layer Encryption: Are You. dll into the same folder as the. I had a old radio shack portable handheld scanner I used for fun when I was younger. A channel or group is programmed to use encryption and a key is loaded into each radio that uses that group. I understand rainbow tables and key scheduling and everything technical. Now that Im older and a lot of crime has been going down in my town I would like to listen in. Download for Android 04 of 04. The National Association of Police Organizations, which lobbies on behalf of police and police unions, supports letting local agencies individually decide whether or not encryption is appropriate for their local needs, said NAPOs Stephanie Gessner in an email. Preppers and Militia-types are buying these radios by the boatloads. Kind of a bitch to set up and I can guarantee hes not decrypting a tactical channel, but just decoding a P25 channel. Depending on the type of information you’re protecting, the type of encryption you use might be different. This has become a mission crit-ical component in the fight against terrorism and advanced encryption systems like AES are being deployed in P25 digital wireless communication systems. However, P25 can unscramble trunked radio calls intercepted by a cheap SDR dongle and let you listen in. Hopefully we never see the day when all communications are Encrypted making our hobby of. This is the sound of an encrypted signal on a P25, Phase II trunked radio system. While you viewing the typical scanner system talkgroup on an active digital channel on a receivable System display: Press HOLD/RESUME HOLD appears on the display. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. It seems (from all the discussions) that the new Uniden BCD396XT and GREs PSR-500 and PSR-600 run neck to neck in that department. Would it be possible? If so what would I need for a portable method. Note that, as in this example, APCO-25 can be a Voice type on a Motorola non “P25” system. RTL-SDR Tutorial: Decoding Digital Voice (P25, DMR, NXDN, D-STAR) with DSD. As you probably know, P25 is where a voice signal is transformed into digital, which is a series of 0s and 1s. The system Chesterfield uses is in the 800MHz band while Virginia State Police use a statewide VHF system. My town is small and I would like to have some sort of hand held radio. These devices are not spe-cific to anymanufacturerhoweverMotorola is currentlysupport-. Press the [A/B] setting and select the A side. Within the P25standard, the keyused to encrypt data is called the TEKorTraffic Encryption Key. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio that’s programmed with the. DES uses a 56-bit encryption key and AES uses a 256-bit encryption key. To install the plugin, simply download the zip file from rtl-sdr. Chesterfield County Sheriff and Richmond PD are all encrypted P25. Modern encryption systems almost exclusively apply to digital transmission where voice information is turned into data and the digital ones and zeros being transmitted can be easily encrypted without any degradation of the transmission. Listen To Police Scanners Encrypted? – LegalProX>Can You Listen To Police Scanners Encrypted? – LegalProX. An anonymous reader writes Two Australian security researchers, Stephen Glass and Matt Robert, have published a paper that details flaws in the encryption. If the P25 signal is encrypted, you will hear garbled unintelligible voice. You could enter the 110 NAC if you want, but its not necessarythe scanner should open up for any clear P25 transmission on that frequency with no NAC set. The type of encryption to use depends on the type of information youre protecting. On the radio, press the [VFO/MR] setting and press Frequency Mode. Simple answerP25 Phase 2 can be monitored. A premium Broadcastify subscription is necessary if you want unlimited, continuous listening times, no ads, and other exclusive features. Most any of the recent digital trunktrackers can hear P25 just fine; however, the quality of the decoding varies between manufacturers. Can a ham radio be used as a police scanner?. However a transmitting radio using encryption will scramble the 0s and 1s around. To listen to normal, non-encrypted DMR, you would need a DMR-compatible radio scanner or handheld transceiver, or an SDR. Private LTE Unified Communications Unified Communications DIMETRA™ Express Migrate to DIMETRA™ Express to secure reliable communications and maxmise your ROI Book a consultation Find Solution Explore our new solution finder and find the best communication solution for your business. Here’s how you can do it properly. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio thats programmed with the encryption key. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. P25 AES256 Encryption Audio Sample X311Spartan 1. On the blue toolbar under the logo, float your mouse over Wiki and click on. Theyre listening: What cops need to know about. Is it legal? No f0urtyfive • 3 mo. Most agencies cant afford the AES encryption option, so they go with DES and therein lies the weakness of their set-up. Alan Massie, Federal Bureau of Investigation What is Next for LLA and LLE?. This is the sound of an encrypted signal on a P25, Phase II trunked radio system. The reality is software-defined radio isnt yet as simple as the plug-and-play of. How to listen to encrypted police radio. There has been talk within the GNU radio groups about this subject. The encryption key is necessary to decrypt the transmission and allow you to listen in. They does not require any decryption to listen to. How do you listen to encrypted police channels? As we have covered above, that in order to have access to encrypted police channels, you will need to have a radio that’s programmed with the encryption key. Understanding the legal basis for decrypting P25 encrypted traffic being illegal. How To Listen To Encrypted P25P25 digital decode threshold adjustments allow user to control of how digital system are decoded inside the scanner. If the P25 signal is encrypted, you will hear garbled unintelligible voice. encryption systems like AES are being deployed in P25 digital wireless communication systems. Listening to Encrypted Police Frequency on a Radio Shack PRO 197 Digital Trunk Tracking Scanner. Worlds Cheapest P25 Receiver decrypt encrypted traffic when the key is known and log traffic to disk for later analysis. The P25standard calls out specific modes of operation forload-ing encryption keys into radios and then managing those keys through an external KeyFill Device. com Forums>Encrypted frequencies. Listening to encrypted P25 is a complex process that requires the right equipment and understanding of the encryption basics. Once you have Linux running, Docker makes the installation straightforward. You can use this free police scanner on Android devices. The only way to listen to the encrypted P25 traffic is with a legitimate radio, programmed by the radio network administrator. DSD+ claims to have improved decoding and audio quality capabilities. As P25 is a digital protocol, it is technically straightforward to encrypt voice and data traffic, something that is far more difficult in the analog domain systems it is designed to replace. DES uses a 56-bit encryption key and AES uses a 256-bit encryption key. 73 Mike nova1010 Member Joined Mar 23, 2005 Messages 0 Location. Good luck with your research… RadioGuy3007 Member Database Admin Joined Jan 27, 2013 Messages 304. com/_ylt=AwrNZ1GQblVk4BUW40lXNyoA;_ylu=Y29sbwNiZjEEcG9zAzIEdnRpZAMEc2VjA3Ny/RV=2/RE=1683349264/RO=10/RU=https%3a%2f%2fwww. Listening to Encrypted Police Frequency on a Radio Shack PRO. Public access to Honolulu police and fire scanners to end. The paper details flaws in the DES-OFB and ADP encryption that enable the encryption key to be recovered by. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. 7K views 3 years ago This is what AES256 encryption sounds like over P25 using a Motorola XTS5000. Listening to Encrypted Police Frequency on a Radio Shack PRO 197 Digital Trunk Tracking Scanner. The plugin does not support trunking or any advanced talk group filtering features that you might find with DSD+, Unitrunker, SDR Trunk etc. In order to actually program a trunked scanner based on that knowledge, you need to know three key pieces of information about the system before you start: System Type System Frequencies Talk Group IDs you want to hear All of this information is usually available from the database at RadioReference. Well, that sounds like a lotta phooey, but some P25 systems are not encrypted, they just need to be decoded. Listening to Encrypted Police Frequency on a Radio Shack PRO >Listening to Encrypted Police Frequency on a Radio Shack PRO. The only way possible to hear an encrypted communication is with a properly programmed System Radio programmed with the encryption keys. He is using a software defined radio to capture radio. If you have a legitimate need to listen to the encrypted traffic, you can ask the agency that is managing the radio network to program a compatible radio. Second is about telecommunications companies making it easier for the government to spy in you. Press on the [BAND] button to receive a frequency band.