The keys you posted are NOT decryption data, but rather the PUBLIC keys with which the ransomware uses to infect data. In this encryption both a Public and a Private key is used, where the Private key is different for every person, and you don’t know it. Contact Kaspersky, as they are the makers of the decryptor.
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Q: If you pedal backwards on a fish, does it go backwards?A:???A fish is not a bicycle. Similarly, you cannot use a private key to encrypt a message or a public key to decrypt a message.
They don't have the right equipment.With, which is a popular public-key cryptosystem but not the only one, the private key and the public key have the same mathematical properties, so it is possible to use them interchangeably in the algorithms. (They don't have the same security properties, however — the public key is usually easily guessable from the private key.) You can take an RSA encryption algorithm and feed it a private key, or an RSA decryption algorithm and feed it a public key. However, the results are not meaningful according to standard algorithms.This symmetry between public keys and private keys does not extend to most other public-key cryptosystems. In general, the public key isn't the right type of mathematical object to use for the decryption algorithm, and the private key isn't the right type of mathematical object to use for the encryption algorithm.This being said, public-key cryptosystems are based on the concept of. A is a function that is easy to compute, but whose inverse is hard to compute. A trapdoor function is like a one-way function, but there is a “magic” value that makes the inverse easy to compute.If you have a trapdoor function, you can use it to make a public-key encryption algorithm: going forward (in the easy direction), the function encrypts; going backward (in the hard direction), the function decrypts. The magic value required to decrypt is the private key.If you have a trapdoor function, you can also use it to make a algorithm: going backward (in the hard direction), the function signs; going forward (in the easy direction), the function verifies a signature.
Once again, the magic value required to sign is the private key.Trapdoor functions generally come in families; the data necessary to specify one particular element of the family is the public key.Even though public-key encryption and digital signatures are based on the same concepts, they are not strictly identical. For example, the RSA trapdoor function is based on the difficulty of undoing a multiplication unless you already know one of the factors. There are two common families of, known as PKCS#1 v1.5 and OAEP. There are also two common families of digital signature schemes based on RSA, known as PKCS#1 v1.5 and PSS. The two “PKCS#1 v1.5” are of similar designs, but they are not identical.
And go into some details of the difference between signature/verification and decryption/encryption in the case of RSA.Beware that some layman presentations of public-key cryptography masquerade digital signature and verification as decryption and encryption, for historical reasons: RSA was popularized first, and the core operation of RSA is symmetric. (The core operation of RSA, known as “textbook RSA”, is one of the steps in an RSA signature/verification/encryption/decryption algorithm, but it does not constitute in itself a signature, verification, encryption or decryption algorithm.) They are symmetric from the 10000-foot view, but they are not symmetric once you go into the details.See also, which explains that you can build an encryption scheme from a signature scheme, but only under certain conditions. $begingroup$ Thanks. 'the public key isn't the right type of mathematical object to use for the decryption algorithm, and the private key isn't the right type of mathematical object to use for the encryption algorithm.' Do you mean they still can be used for those purposes, but are not good options, or they can't be? What mathematical properties that decide that they aren't the 'right' type, besides security properties (e.g. Asymmetry in hardness to guess one key from the other)?
$endgroup$–Jun 17 '16 at 11:29. $begingroup$ @KennethWorden It's mostly correct, but gets some of the details wrong. Under “Applying the Signature”, “the hash is encrypted” should be “the hash is signed”, and that alone makes the digital signature. And under “Verifying the Signature”, there's no such thing as a “decrypted hash”: for most signature schemes, you can't get the hash back from the signature, what happens instead is that there's a different mathematical operation (called verification) which takes the hash and the signature as inputs and outputs “ok” or “bad”. $endgroup$–Dec 6 '19 at 16:34.
Think of the the public key in a asymmetric encryption as a lock instead of a key. Would the hacker who have a lock and a locked box with that lock, unlock the locked box? Of course no, and to unlock that box you need the lock key. Which was never sent in public, and only the sender has it.However, the answer is Yes:D it's actually possible for a hacker to decrypt the message using only the public key (lock and a locked box). But that's extremely hard for any computer today. Because reverting that encrypted message using that public key is a very hard mathematical operation especially when that key is as large as 2048-bit number.
The strength of the mathematical operation relies on the hardness of the prime factorization of a large number.Here's a good video explaining how the RSA algorithm works.
Originally Posted By mikecnorthwest:Or the frequency you were monitoring is used for data transmissions, not voice. Radioreference.com is the best source of radio system information. Search for your county or local system.The new APCO-25 radios are data transmissions.
The audio from the mic is encoded in a digital codec, then transmitted as data, with some other info included in the packets, then it is decoded on the receiving side and converted back to audio, with some digital information displayed on the LCD if so equipped. Originally Posted By Thoughtcrime:I doubt it is scrambled.They are probably using trunked radio.If they were just using trunking, you would hear plain audio on an analog scanner, but you would only hear parts of the conversation as the radio jumped frequencies between transmissions.That's what I was hearing, a garbled word, or part of one, then a bunch of clicks, another garbled word fragment, then more clicks, and so on.Then that could be trunking. What Police department?
I can tell you real quick what they are using. Originally Posted By Thoughtcrime:I doubt it is scrambled.They are probably using trunked radio.If they were just using trunking, you would hear plain audio on an analog scanner, but you would only hear parts of the conversation as the radio jumped frequencies between transmissions.That's what I was hearing, a garbled word, or part of one, then a bunch of clicks, another garbled word fragment, then more clicks, and so on.Then that could be trunking. What Police department? I can tell you real quick what they are using.Eastpointe MI, but I was listening to the Macomb County channel (multiple departments use it), I think that's the one Easpointe uses.
Originally Posted By Thoughtcrime:I doubt it is scrambled.They are probably using trunked radio.If they were just using trunking, you would hear plain audio on an analog scanner, but you would only hear parts of the conversation as the radio jumped frequencies between transmissions.That's what I was hearing, a garbled word, or part of one, then a bunch of clicks, another garbled word fragment, then more clicks, and so on.Then that could be trunking. What Police department?
I can tell you real quick what they are using.Eastpointe MI, but I was listening to the Macomb County channel (multiple departments use it), I think that's the one Easpointe uses.It looks like they are on a trunked APCO-25 system. Here is all the info if you decide to get a digital scanner. Originally Posted By SAC:Eastpointe MI, but I was listening to the Macomb County channel (multiple departments use it), I think that's the one Easpointe uses.Just looked it up, they use an APCO-25 system. You need a scanner that can decode that type of system, and if they use encryption on top of that (unlikely, but there are a few departments that do), you're hosed.I belive he was listing to a state wide trunked apco-25 system. He will need a digital scanner, plus all of the trunking info I gave him in a previous link. Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm. So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner.
I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date. There's plenty of scanners now that can decode in real time a digitally trunked system.
As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems. Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm. So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner.
I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date. There's plenty of scanners now that can decode in real time a digitally trunked system.
As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.Yup. I have a RadioShack 106 that will decode APCO-25. Police will tell you their system is encrypted because they think it is. 95% of them are not. They only encrypted frequencies I have found were tac channels.
Most do not encrypt because of cost and/or interoperability between agencies. Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm.
So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner. I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date. There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.Yup.
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I have a RadioShack 106 that will decode APCO-25. Police will tell you their system is encrypted because they think it is. 95% of them are not. They only encrypted frequencies I have found were tac channels. Most do not encrypt because of cost and/or interoperability between agencies.Most state and local agencies are not encrypted but some of the federal agencies are. Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm.
So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner. I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date.
There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systemYup.
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I have a RadioShack 106 that will decode APCO-25. Police will tell you their system is encrypted because they think it is. 95% of them are not. They only encrypted frequencies I have found were tac channels. Most do not encrypt because of cost and/or interoperability between agencies.Is there anything that can decrypt actual encrypted signals? Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm.
So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner. I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date.
There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.For the low low price of $500. Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm. So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner.
I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date. There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.For the low low price of $500Digital trunking scanners are friggin expensive.
No way around that. Other than rolling your own with an SDR. There's a lot going on inside that unit.
Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm. So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner. I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date.
There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.For the low low price of $500Digital trunking scanners are friggin expensive.
No way around that. Other than rolling your own with an SDR. There's a lot going on inside that unit.What's an SDR? Originally Posted By offctr:they are trunked but they are digital -and around here only the state police and either Motorola or Harris whomever built the system know the encoding algorithm. So essentially they are encrypted but its more like trying to listen to a nextel radio or digital phone signal on an analog scanner. I don't think there is a scanner built that can deal with all the variables fast enough to decode the signal back to intelligible audio -its essentially an EDACS system on steroids (Google opensky)No offense but your info is out of date.
There's plenty of scanners now that can decode in real time a digitally trunked system. As long as the system in question is not using an encryption routine on top of the digital encoding, its not difficult at all to monitor such systems.For the low low price of $500Digital trunking scanners are friggin expensive.
No way around that. Other than rolling your own with an SDR. There's a lot going on inside that unit.What's an SDR?Software Defined Radio.
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