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Search found 10 matches
- Mon Jun 26, 2017 7:01 am
- Forum: Questions & Answers
- Topic: Non identifiable Javacards
- Replies: 3
- Views: 10645
Re: Non identifiable Javacards
I just want to know if, when buying smartcards for implementing a system, these smartcards are going to have an unique serial number or identifier that the reader can check because if so, there is no way to implement a secure anonymous authentication as long as the reader can just check the identifi...
- Mon Jun 19, 2017 7:40 pm
- Forum: Questions & Answers
- Topic: Non identifiable Javacards
- Replies: 3
- Views: 10645
Non identifiable Javacards
Hi, I need to know if you can set a group of Javacards that you are going to use for an anonymous access application in a way that they can't provide explicit information to the reader that makes them completely identifiable. I mean, I want to know if you can tell the issuer not to include data that...
- Sun Jun 04, 2017 4:22 pm
- Forum: Questions & Answers
- Topic: Measure APDU time and memory
- Replies: 3
- Views: 9682
Re: Measure APDU time and memory
Ok, now I see I can use the pyAPDUTool together with JCIDE to send APDU's and measure time there (have been using only the JCIDE debugger command line). Thanks for ur help mate.
- Sat Jun 03, 2017 2:28 pm
- Forum: Questions & Answers
- Topic: Measure APDU time and memory
- Replies: 3
- Views: 9682
Re: Measure APDU time and memory
Sorry UNKNwYSHSA but I can see where you measure the time with JCIDE. I took a picture running the code you provided so that you can check there is no time measure in the response. Can you tell me how I can make it to be displayed like you showed after the code?
- Mon May 29, 2017 3:58 pm
- Forum: Questions & Answers
- Topic: Measure APDU time and memory
- Replies: 3
- Views: 9682
Measure APDU time and memory
Hi, Now I've developed and Applet in javacard with JCIDE I want to know how much time (and memory if possible but less important) does it take an especific APDU to execute. I've been searching for a while without success. Is there any javacard code to measure time between 2 lines or does the debugge...
- Tue May 23, 2017 3:59 pm
- Forum: Questions & Answers
- Topic: Array of arrays in javacard
- Replies: 3
- Views: 9607
Re: Array of arrays in javacard
That's exactly what I was looking for. I'm very grateful 
- Sun May 21, 2017 8:15 pm
- Forum: Questions & Answers
- Topic: Array of arrays in javacard
- Replies: 3
- Views: 9607
Array of arrays in javacard
Hi, I need to save several messages into my Javacard (lets say 40 or 50 of 500 bytes aprox. variable sized -less than 30KB in total-). After been verified by PIN I need to randomly response one of the messages that hasn't been already used so that I thougth i could store all byte array messages in a...
- Wed Apr 05, 2017 5:07 am
- Forum: Questions & Answers
- Topic: Save data permanently into JavaCard and Protect with PIN
- Replies: 4
- Views: 13529
Re: Save data permanently into JavaCard and Protect with PIN
Thank you both for your answers. I'll read the docs in order to improve my knowledge of the javacard technology. By the way, Do you know if there is a limit of non-volatile memory that the JCIDE can emulate?
- Mon Apr 03, 2017 3:40 pm
- Forum: Questions & Answers
- Topic: Save data permanently into JavaCard and Protect with PIN
- Replies: 4
- Views: 13529
Save data permanently into JavaCard and Protect with PIN
Hi, I'm a newby in the smartcard world and I'm developing an applet which have to use group signatures inside the smartcard. Due to that fact I NEED to store 2 key values securely into the smartcard (protected with PIN) and they have to be persistent after power off or deselecting. I've read some do...
- Wed Mar 22, 2017 5:02 pm
- Forum: Questions & Answers
- Topic: File protection with PIN
- Replies: 1
- Views: 6960
File protection with PIN
Hi, I'm developing a JC project for my university degree and I'm new to JavaCard. I would be grateful if somebody can link (to a manual or reference) or tell me how to safely protect a file with the PIN of the smartcard (and/or how to create the file). I know it is not a very specific question but I...