Search

Christy16

I want a random number generation tool.

Can anybody tell me where can I download it? ?

thanks.

Christy16

I would like to create a program that can detect smart card reader, java card's power up or down, send and receive APDU command.
You may say that this program looks like pyapdutool... Yes, but I need to finish it in C# language. Is there a similar open source program?

Christy16

I am trying to generate random number for a get challenge command, but every time I always got the same number, I need a 8 byte unique number generated every time.Here is my code. Can anyone help me out? Thanks a lot. byte[] apduBuffer = apdu.getBuffer(); RandomData random = RandomData.getInstance(R...

Christy16

I want to use a secure channel for chaining data from and to the smart card. And I would like to use the global platform secure channel to realize this. In this case, I have to use the GP mutual auth method to init a secure channel. But if i do so, an attacker of the applet would be able to block th...

Christy16

UNKNwYSHSA wrote:Both can be choosed. There's more NVM space on A22CR.

Thank you for your answer,UNKNwYSHSA. But have you tested the related operation on A22CR card with ISO applet? It would be nice if you can tell me more details.

Christy16

Has anyone tried to run and test ISOApplet on JC30M48CR card or A22CR card? The ISOApplet fits my project well, however I don't know which card to choose. Hope someone can help. Thanks.

Christy16

My card supports ALG_ECDSA_SHA. As we all know,for java card, hash calculation is time-consuming,let along data transferring time. Thus I want to do hash on pc and then send digest to my card for signing.
But I don't know how to do this. Any help?

Christy16

Thanks for the quick reply.

I have another question. ISO/IES 7816-4 says that 0x20 - 0x3f are reserved for future use. Does that mean I should not use these CLAs? Right ?

Christy16

Can I use 0x80 as my CLA value? ISO/IEC 7816-4 spec states that for this CLA, the command coding and meaning is proprietary. Does that mean it is proprietary to my code? And I don't have any question with using this value, so it indicated that this value is legal, right?

Christy16

Hi all in here. What differences are there between having an OS in EEPROM and having an OS in ROM? What about algorithms in EEPROM or ROM?

Could any one tell me the advantage and disadvantage between them? Thanks a lot.

Search found 12 matches

About the random number generation tool

Create a program with C#

Generate random number

secure channel security question

Re: ISOApplet on JC30M48CR or A22CR

ISOApplet on JC30M48CR or A22CR

Do hash on PC and send digest to my card for signing

Re: CLA value

CLA value

Difference between OS in EEPROM and in ROM

Board Disclaimer