Implementation of ECIES for Hybrid Encryption

harkeerat · December 24th, 2008, 09:26 PM

Dear Sir,

Thank you for your work on Beginning Cryptography with Java. It has been very beneficial for my research work.

Part of my work involves implementing a Hybrid Cryptosystem, where symmetric keys are used to encrypt data which are then encrypted using asymmetric encryption. I am planning to use ECC + AES to accomplish this task.

I am able to implement data encapsulation using AES; however I am not able to figure out how I can use ECC for encrypting AES keys.

Can ECIES be used for this task?

If so, can you please provide me some useful information on ECIES and how one can implement it in java. Any sample code or links?

Also, I was able to find source code for ECIESTest.java from bouncycastleâs website but was not able to follow the code completely.

Following are my queries regarding ECIESTest.java,

What is the purpose of IEKeySpec and IESParameterSpec objects?

Why does IEKeySpec take private and public keys as it parameters?

Quote:

IEKeySpec c1Key = new IEKeySpec(aPriv, bPub);

Kindly provide your assistance regarding the above queries,

Thanks in advance,

Regards,
Harkeerat

harkeerat · January 4th, 2009, 06:38 PM

Any ideas?

amrishodiq · March 2nd, 2009, 04:45 AM

If you try to use ECC with AES, you better use ECDH. I wrote a code that implement them. See it here:
http://www.amrishodiq.co.cc/elliptic...ion-with-java/. Hope it'll helps.

harkeerat · June 11th, 2009, 07:05 PM

Quote:

Originally Posted by amrishodiq

If you try to use ECC with AES, you better use ECDH. I wrote a code that implement them. See it here:
http://www.amrishodiq.co.cc/elliptic...ion-with-java/. Hope it'll helps.

Thank you amrishodiq for your post. I went through your link earlier when it was online. However, part of my work does not require the use of ECDH.

I was able to accomplish hybrid cryptography using ECIES and AES through another provider called FlexiProvider.

They provide very detailed examples at their website:

http://www.flexiprovider.de/examples/ExampleECIES.html

For those wanting to accomplish the same task, the above mentioned site can be very useful.

Regards,
Harkeerat

dgh · June 11th, 2009, 08:20 PM

Both the BC lighweight APIs and the BC provider support IES for EC and Diffie-Hellman.

You can find examples of usage in source distribution by looking at the test classes.

Regards,

David

rohitketkar87 · March 11th, 2011, 10:54 AM

Quote:

Originally Posted by harkeerat

Thank you amrishodiq for your post. I went through your link earlier when it was online. However, part of my work does not require the use of ECDH.

I was able to accomplish hybrid cryptography using ECIES and AES through another provider called FlexiProvider.

They provide very detailed examples at their website:

http://www.flexiprovider.de/examples/ExampleECIES.html

For those wanting to accomplish the same task, the above mentioned site can be very useful.

Regards,
Harkeerat

hi harkeerat, i also tried to use the same code for ECIES from Flexi provider but i am encountering some sort of internal error that i am not able to figure it out. i downloaded all the jar files and packages and also pasted in java/.../ext. Can u tell me how to implement it correctly.

rohitketkar87 · March 11th, 2011, 12:59 PM

Hi everyone,
Can anyone please tell me how i implement ECIES in java. Does any source code available for it. I tried implementing using FlexiProvider but was no luck.
Thanks in advance.