If you have 23 years: A commodity 2.5GHz Intel Core i7 processor can easily compute one million DES keys per second in software using the OpenSSL library. This is, however, optimized for the case of encrypting the key with large volumes of traffic and not key searching. A bit-sliced implementation carefully optimized for key searching can reach in excess of twenty-eight million keys/second. Even so, DES is not trivially defeated. Even at one hundred million keys per second it will take almost twenty-three years to search the whole key space. It is possible to achieve much better performance using dedicated hardware and many processors running in parallel. In 1998 the EFF constructed an ASIC-based device that could search the DES keyspace within 9 days at a cost of 250,000 US$ 8.
Since salt and IV must be the same between the encryption and decryption of a given string, the salt and IV is prepended to the cipher text upon encryption and extracted from it again in order to perform the decryption. The result of this is that encrypting the exact same plaintext with the exact same password gives. Advanced Encryption Standard Algorithm Validation List Last Update: 4/26/2017. The page provides technical information about implementations that have been validated. It is important to note that the items on this list are cryptographic modules.
![Decrypt Decrypt](/uploads/1/2/5/3/125397594/381261739.jpg)
Also the research is on the conventional side of the house. On a TRS, either a 3600 or APCO25, when you employ encryption the ability to make a clear call on a talk-group that is strapped for secure is impossible. And even using a different key will not allow the rogue user to be able to communicate with valid users as they will not be able to hear each other.
The paper is not all inclusive, especially where trunking systems are employed that create additional layers of protection. Conventional is very easy to manipulate and the more experienced technical users are well aware of it. The most important thing is that the end user devices are properly programmed and secure channels are strapped secure only. If a radio looses its keys it should be taken out of service and a loaner radio supplied unti it can be re-keyed by a keyloader or OTAR.