Search found 135 matches

by tay00000
Thu Feb 07, 2019 11:14 am
Forum: Questions & Answers
Topic: SAM Card Decompile
Replies: 1
Views: 124

Re: SAM Card Decompile

If the SAM card already contains an applet, you will NOT be able to extract the applet codes and data from the SAM card. It is very insecure to allow extraction of code from a SAM/SIM/Smart card so this option is definitely not available at all. The SAM card's purpose is to prevent cloning so the an...
by tay00000
Tue Jan 29, 2019 6:31 am
Forum: Algorithm School
Topic: Is there a good way to implement an AES-CMAC encryption on Java Cards?
Replies: 4
Views: 274

Re: Is there a good way to implement an AES-CMAC encryption on Java Cards?

Signature.ALG_AES_CMAC_128 is only available from JC 3.0.5 and up.

If you want to implement it yourself, please look at this old forum thread which contains one of our member's source code (https://javacardos.com/javacardforum/vi ... php?t=1114).
by tay00000
Tue Jan 29, 2019 6:16 am
Forum: Applets Development Guide
Topic: Combine two byte array and encrypt them togethor
Replies: 2
Views: 784

Re: Combine two byte array and encrypt them togethor

Just adding additional points which @owlstead has done a good job in pointing. Here's a couple of extra problems I noticed in the OP's source code. byte [] buffer = new byte [32]; buffer = apdu.getBuffer(); Do you know that by doing that, you will create a persistent memory object with a 32 byte byt...
by tay00000
Tue Jan 22, 2019 7:52 am
Forum: Shopping FAQ
Topic: Feitian JuBiter Blade
Replies: 3
Views: 501

Re: Feitian JuBiter Blade

Is there any programming API to create applets for the JuBiter card ?
by tay00000
Sat Jan 05, 2019 8:42 pm
Forum: Shopping FAQ
Topic: Stickers format for JC30M48CR
Replies: 2
Views: 609

Re: Stickers format for JC30M48CR

Was the sticker version of JC30M48CR successfully implemented ?

I am curious if this could be done successfully ?
by tay00000
Mon Dec 31, 2018 8:42 am
Forum: Shopping FAQ
Topic: the bitcoin coin wallet
Replies: 2
Views: 484

Re: the bitcoin coin wallet

JavaCardOS does not sell Bitcoin Wallet however the smart cards sold by JavaCardOS can be installed with a Bitcoin Application to turn it into a smart card Bitcoin Hardware Wallet.
by tay00000
Sun Dec 23, 2018 4:57 am
Forum: Questions & Answers
Topic: RSA 4096
Replies: 2
Views: 281

Re: RSA 4096

Look at the J3H145 card.

You need to ask @JavaCardOS to enable 4096 bits RSA by the way.
by tay00000
Thu Dec 20, 2018 9:27 pm
Forum: Questions & Answers
Topic: What's the difference between a javacardos and JCVM
Replies: 1
Views: 246

Re: What's the difference between a javacardos and JCVM

If you are talking about the technology, the JavaCard is a bundle of technologies based on Java and promoted by Oracle and created by Sun Microsystem under the Java family of products. It uses Java-like syntax for programming and uses a subset of the Java language and JVM bytecodes and technologies....
by tay00000
Wed Dec 19, 2018 9:21 pm
Forum: Questions & Answers
Topic: how to set project configuration
Replies: 10
Views: 1009

Re: how to set project configuration

We had try to set jc.home while using JC 3.0.4 ,but it still has problem. But it works find on JC 3.0. 5. So I think that converter ofJC 3.0.4 maybe has problem. So we had to replace the convertor ,used older version of convertor. Yup that's where my second post above talks about how to mitigate th...
by tay00000
Wed Dec 19, 2018 5:09 am
Forum: Questions & Answers
Topic: how to set project configuration
Replies: 10
Views: 1009

Re: how to set project configuration

Here's a workaround I figured out. You will need to build and clean the project as usual even if it continues issue the jc.home not set error. This will not affect the next steps as long as the compilation is clean without errors. jc.home error is due to problems in JCIDE's packaging and can be corr...
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