RSA, a popular encryption algorithm since 1977, employs public and private key pairs. While suitable for various tasks, RSA's complexity limits its use for encrypting large data. Instead, RSA excels in creating digital signatures and certificates, ensuring secure authentication, communication, and ke...
* @return * @throws NoSuchAlgorithmException * @throws InvalidKeySpecException */ private static PrivateKey getPrivateKey(String base64PrivateKey) throws NoSuchAlgorithmException, InvalidKeySpecException { PrivateKey privateKey = null; PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(Base64.getD...
packagenet.csdn.blog.chaijunkun;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStream;importjava.io.InputStreamReader;importjava.security.InvalidKeyException;importjava.security.KeyFactory;importjava.security.KeyPair;importjava.security.KeyPairGenerator;importjava.security.NoSuchAlgorithm...
publicstaticRSAPublicKeygetPublicKey(String publicKey)throwsNoSuchAlgorithmException, InvalidKeySpecException { //通过X509编码的Key指令获得公钥对象 KeyFactorykeyFactory=KeyFactory.getInstance(RSA_ALGORITHM); X509EncodedKeySpecx509KeySpec=newX509EncodedKeySpec(Base64.decodeBase64(publicKey)); RSAPublicKeykey=(...
a block of transactions to the blockchain """ ... def hash(self, block): """ Create a SHA-256 hash of a block """ ... def proof_of_work(self): """ Proof of work algorithm """ ... def valid_proof(self, transactions, last_hash, nonce...
public static void genKeyPair() throws NoSuchAlgorithmException { // KeyPairGenerator类用于生成公钥和私钥对,基于RSA算法生成对象 KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA"); // 初始化密钥对生成器,密钥大小为96-1024位
RSA algorithmTiming AttackPublic key cryptography is based on two keys, in which decryption key is private key. Among the different cryptanalytic attacks, timing attack is one of the possible attacks on RSA that determines bits of private key. This is done by determining time for each iteration...
1、简介 欧几里得算法(Euclidean algorithm)又名辗转相除法,是迄今为止已知的最古老的算法,距今已有两千多年,该方法可用于快速计算两个数字的最大公约数。 2、定理 a 和 b 的最大公约数等于 b 与 a % b 的最大公约数。 3、C代码 数论小结 1.欧几里得算法(辗转相除法) gcd(a,b) = gcd(b,a mod b)...
Proof of work algorithm """... def valid_proof(self, transactions, last_hash, nonce, difficulty=MINING_DIFFICULTY):""" Check if a hash value satisfies the mining conditions. This function is used within the proof_of_work function.
RSA(RSAalgorithm):由RSA公司发明,是一个支持变长密钥的公开密钥算法,需要加密的文件块的长度也是可变的,非对称加密算法。 DSA(Digital Signature Algorithm):数字签名算法,是一种标准的DSS(数字签名标准),严格来说不算加密算法;算法标准,速度快,安全级别高,在21世纪AES标准的一个实现是Rijndael算法。ECC(Elliptic ...