简体繁体中英

How do I cipher plaintext using ECDH?

原文 2011-09-22 20:39:39 1 1 java/ android/ bouncycastle/ elliptic-curve/ ecdh

I'm looking for sample Java code to implement the cipher for ECDH encryption. I've already found the method to get the keys required but still haven't found a solution to encrypt the text. Appreciate if anyone can give some guidance.

Btw I am using SpongyCastle as I am programming for Android.

Many Thanks!

1 answers

ECDH is not an encryption algorithm; it cannot encrypt some data you choose. It is a key agreement protocol, which results in a "shared secret": the data which both sender and receiver end up sharing is "secret" (only them know it) but they cannot control its contents.

The idea is that you can use the shared secret as the basis for a symmetric encryption algorithm. Since the shared secret has a relatively non-flexible format (with ECDH, the shared secret is an elliptic curve point, and about half of it is really secret), the normal way is to hash it with a secure hash function (say, SHA-256) and use the hash output (or part of it) as the actual encryption key.

How do I disable cipher suite using java.security

Encrypting using Vigenere cipher where Plaintext is read from a file (JAVA)

How do I RSA encrypt a string with a plaintext key using Java BouncyCastle API on Android

How do I assign roles/permissions in a plaintext XML

How do I make the cryptText character the same as the plainText character?

how do i retrieve the original plaintext password of a hashed password

Scytale cipher plaintext and Z implementation

How do I encrypt a message and then I decryot it on another device with javax.crypto.cipher using AES

How do i modify my code below using Caesar Cipher - JAVA

Caesar Cipher: I want to shift user input (plaintext) “n” number of times

暂无

The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.

Related Question How do I disable cipher suite using java.security Encrypting using Vigenere cipher where Plaintext is read from a file (JAVA) How do I RSA encrypt a string with a plaintext key using Java BouncyCastle API on Android How do I assign roles/permissions in a plaintext XML How do I make the cryptText character the same as the plainText character? how do i retrieve the original plaintext password of a hashed password Scytale cipher plaintext and Z implementation How do I encrypt a message and then I decryot it on another device with javax.crypto.cipher using AES How do i modify my code below using Caesar Cipher - JAVA Caesar Cipher: I want to shift user input (plaintext) “n” number of times

Related Tags

How do I cipher plaintext using ECDH?

Question

1 answers

solution1 3 2011-09-24 23:02:36

solution1
3 2011-09-24 23:02:36