x, y = y, (x - (a // b) * y)returnx, y, q 大步小步算法(BSGS算法) //C++#include <iostream>#include <cstdio>#include using namespace std; typedef long long LL; LL quick_mod(LL a, LL b, LL c)//费马小定理+快速幂求逆元 { LL ans =1;while(b) {if(b %2==1) ans =...
计算phi = (p-1) * (q-1) 。 选取任意e,使得e满足 1<e<phi 且 gcd(e , phi) == 1 。 计算e关于 phi 的模逆元d, 即d满足(e * d)% phi ==1 。 加解密:c = (m ^ e) % n , m = (c...
使用openssl list-cipher-commands可以查看支持哪些对称加密算法. 常见的对称加密算法有aes-256-cbc。 crypto 模块中提供了createCipheriv和createDecipheriv来进行加密和解密的功能: crypto.createCipheriv(algorithm, key, iv) crypto.createDecipheriv(algorithm, key, iv) 这两个方法都接收 3 个参数: algorithm:加密解...
CCTF{SSS_iZ_4n_3fF!ciEn7_5ecr3T_ShArIn9_alGorItHm!} Nabat 题目描述 首先产生一个随机的 n,多项式 g(x)=x2+x+2,我们需要输入一个整系数多项式 f,使得 f 满足: f 的系数绝对值均不大于 1 f 的次数 df 满足df+1≥2log(n) f 中系数为 0 的项的个数不小于 ⌊2df/3⌋−3 g∣f...
先来看下 crypto.createCipher(algorithm, password),两个参数分别是加密算法、密码 algorithm:加密算法,比如aes192 具体有哪些可选的算法,依赖于本地openssl的版本 可以通过openssl list-cipher-algorithms命令查看支持哪些算法 password:用来生成密钥(key)、初始化向量(IV) ...
crypto.createDecipheriv(algorithm, key, iv) 这两个方法都接收 3 个参数: algorithm:加密解密的类型 key: 加密解密的密钥 iv:初始向量 下面是一个例子: constcrypto=require("crypto");// 生成符合规范长度的密钥functiongenkey(secret,length=32){returncrypto.createHash('sha256').update(String(secret)).di...
Security-wise, Dogecoin uses a PoW model but with a Scrypt-based algorithm, which reduces mining centralization. Its infinite supply model ensures transaction affordability but introduces inflationary concerns. Regulatory risks remain, though growing institutional exposure increases legitimacy. Most importantly...
This third-generation cryptocurrency gained traction at crypto casinos thanks to its unique features. Launched in 2017 by one of Ethereum’s co-founders, Charles Hoskinson, it stands out with its emphasis on sustainability and security thanks to its Ouroboros proof-of-stake algorithm. ...
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目前所有的已实现模式都实现于 ApiCryptoAlgorithm 接口,需要什么模式将该接口其对应的实现类 @Bean 注入即可。@Configuration public class ApiCryptoConfiguration { /** * 摘要加密 Bean */ @Bean public ApiCryptoAlgorithm digestApiCrypto() { return new DigestApiCrypto(); } /** * 对称性加密解密 Bean ...