Elliptic Curve algorithm equivalent to RSA's asymmetric encryption?

CIYAM

legendary

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Ian Knowles - CIYAM Lead Developer

Quote from: ffunenga on October 02, 2012, 01:39:49 AM

This means that ECDSA is only used to check the message integrity. As far as the algorithm is concerned, the trasnmission can be: "plain_text_message+signature"

Interesting - I must admit I have never properly looked into the details of ECDSA before (and although my logic is good my other math is rather average).

As the Bitcoin ledger is public it of course makes sense that nothing is encrypted but instead just correctly signed.

ffunenga

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yes i have Sad

In section "Key and signature size comparison to DSA" its written: "Suppose Alice wants to send a signed message to Bob."
In "Signature verification algorithm" step 2 has: "e=HASH(m)" That m is the plain text message.

This means that ECDSA is only used to check the message integrity. As far as the algorithm is concerned, the trasnmission can be: "plain_text_message+signature"

What I want is a way to cypher a message in a asymmetric fashion, just like RSA.

CIYAM

legendary

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Ian Knowles - CIYAM Lead Developer

Did you look at this link?

http://en.wikipedia.org/wiki/Elliptic_Curve_DSA

ffunenga

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I've been searching but I cant find anything about this... only EC Diffie-Hellman [1] with symmetric cryptography, which is exactly what I do not want Sad

Imagine this:

generate a random private key, k
then calculate a "public key" with ECC, d=kG

The algorithm I'm looking for is this: any message cyphered with the public key will "only" be decyphered by the owner of the private key.

Does this exists? Has anything like this been developed yet?

[1] http://en.wikipedia.org/wiki/Elliptic_curve_Diffie%E2%80%93Hellman

Topic: Elliptic Curve algorithm equivalent to RSA's asymmetric encryption? (Read 966 times)