Programmer Think

See the column collection for the detailed explanation and implementation of other modern cryptography algorithms~ MD5 algorithm Algorithm process (i) Message filling First, fill in the message so that its length is 64 bits less than the integer multiple of 512 (these 64 bits are used to record the original data length). The filled content c ...

Defcon 2018 Qualify: Easy Pisy 1. Source Code The title is given to two people: execute.php <?php include 'common.php'; if ($_SERVER['REQUEST_METHOD'] === 'GET') { print highlight_string(file_get_contents("execute.php"), TRUE); exit(0); } $keys = get_keys(); $privkey = $keys[0]; $pubkey = $keys[1]; $file_info = $_FILES['userf ...

Java implements password adding random salt for MD5 digest encryption (2021 / 05 / 11) 1. General In daily development, we often face the problem of saving the user password. We must not store the password in plaintext to the database. We can use hash digest algorithm to encrypt the password and then save it to the database. Hash digest ...

📒 Blog home page: Actor's blog 🎉 Welcome to pay attention 🔎 give the thumbs-up 👍 Collection ⭐ Leave a message 📝 ❤️ Look forward to communicating together! 🙏 The author's level is very limited. If you find an error, please let me know. Thank you! 🌺 If you have any questions, you can communicate by private letter!!! 🌺 outline # ...

AES encryption principle brief introduction Advanced Encryption Standard (AES), also known as Rijndael encryption method, is a block encryption standard adopted by the federal government of the United States. It is also an alternative to DES algorithm and one of the most popular symmetric encryption algorithms today. Symmetric encryption is t ...

📒 Blog home page: Actor's blog 🎉 Welcome to pay attention 🔎 give the thumbs-up 👍 Collection ⭐ Leave a message 📝 ❤️ Look forward to communicating together! 🙏 The author's level is very limited. If you find an error, please let me know. Thank you! 🌺 If you have any questions, you can communicate by private letter!!! 🌺 outline # ...

📒 Blog home page: Actor's blog 🎉 Welcome to pay attention 🔎 give the thumbs-up 👍 Collection ⭐ Leave a message 📝 ❤️ Look forward to communicating together! 🙏 The author's level is very limited. If you find an error, please let me know. Thank you! 🌺 If you have any questions, you can communicate by private letter!!! 🌵 outline # ...

RSA RSA encryption takes advantage of the simple forward solution and complex reverse solution of one-way function Basic concepts 1, What is "prime"? A prime number is an integer that cannot be expressed as the product of any other two integers except that it can be expressed as the product of itself and 1. For example, 15 = 3 ...

📒 Blog home page: Actor's blog 🎉 Welcome to pay attention 🔎 give the thumbs-up 👍 Collection ⭐ Leave a message 📝 ❤️ Look forward to communicating together! 🙏 The author's level is very limited. If you find an error, please let me know. Thank you! 🌺 If you have any questions, you can communicate by private letter!!! 🥦 Algorithm a ...

The second bullet of BUUCTF-RSA check-in question, interesting or difficult RSA questions are placed separately in the column BUUCTF RSA column_ Xiaohan's blog - CSDN blog Dangerous RSA (low encryption index attack) subject n=0x52d483c27cd806550fbe0e37a61af2e7cf5e0efb723dfc81174c918a27627779b21fa3c851e9e94188eaee3d5cd6f752406a43fbecb53 ...