CRYPTO NEWS

How does the ECIES-AES encryption work with a key size that is not supported by AES?

I am currently studying and implementing ECC algorithms but I encountered a problem. I want to use Secp521r1 for generating a shared-key and encrypting with ECIES using AES256 but AES-256 requires a 256-bit key while the shared-key is 521-bits. How can I use a 521-bit shared-key for encrypting with ECIES AES-256? Should it be hashed> If so, if I want to professionally use AES128, I could use md5 but isn’t md5 considered unsafe for use?

Another question I have is that the document: SEC, ver 1.9, on page 34 on MAC generations says:

  1. Convert M to a bit string M and K to a bit string K using the conversion routine specified in Section 2.3.2.

I do not understand why I should convert the shared-key to a bit string while HMAC_SHA512 gets key input as a byte array. The document also suggests the same thing for encryption specified in Section 3.8.3.

Making a secure bitcoin wallet [closed]

I’m thinking of creating a very secure wallet to keep my crypto for a long time. What I’m going to do right now is to install a fresh android OS on a virtual machine and disconnect it from internet. Install Coinomi wallet on it and create a new wallet and also protect the privatekey with::Listen

I’m thinking of creating a very secure wallet to keep my crypto for a long time.
What I’m going to do right now is to install a fresh android OS on a virtual machine and disconnect it from internet. Install Coinomi wallet on it and create a new wallet and also protect the privatekey with a bip39 passphrase. write down the recovery keys and the passphrase on a paper. copy the wallet public address and completely wipe the Coinomi app and the OS. Can this assure me that nobody can find my wallet private keys? (Of course I’m aware that still one can brute force it or someone might find the paper)

How does the ECIES-AES encryption work with a key size that is not supported by AES?

Shopping cart
There are no products in the cart!
Continue shopping
0