电能表预付费系统-标准传输规范(STS)（31）
6.5.3.4 DKGA02: DecoderKeyGenerationAlgorithm02
The DecoderKeyGenerationAlgorithm02 may be used for all payment meters that do not meet the criteria for selecting DecoderKeyGenerationAlgorithm01 . The POS ApplicationProcess gives the appropriate directive by means of the DKGA code in the APDU.
DecoderKeyGenerationAlgorithm02可用于所有不符合选择DecoderKeyGenerationAlgorithm01标准的付费计程表。POS应用程序通过APDU中的DKGA代码给出适当的指令。
The DecoderKey is diversified from a 64-bit single DES VendingKey value.The process flow for the DKGA02 is shown in Figure 11 .
DecoderKey与64位单个DES VendingKey值不同。DKGA02的流程流如图11所示。
Construct the 64-bit PANBlock and the 64-bit CONTROLBlock as defined in 6.5.3.1 and 6.5.3.2.
Encryption is DEA in accordance with FIPS PUB 46-3, single DES in ECB mode, using a single 64-bit DES Vending
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