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0x01 introduction MD5 message digest algorithm (English: MD5 message digest algorithm), a widely used cryptographic hash function, can generate a 128 bit (16 byte) hash value. It can be used to ensure the integrity and consistency of information transmission. Save the password in the database (md5(pass,salt) mode). 0x02 algorithm flow 1. Dat ...

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📒 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!!! 🥦 OpenSSL pro ...

Backpack Cryptograph is missing Mathematics Lattices 1. Vectors Basic vector-to-scalar operations Title: v = (2,6,3), w = (1,0,0) and u = (7,7,2), calculate 3*(2*v - w) ∙ 2*u. Calculate directly using sage sage: v = vector([2,6,3]) sage: w = vector([1,0,0]) sage: u = vector([7,7,2]) sage: 3*(2*v-w)*2*u 702 flag is 702 2. Size ...

catalogue Encryption mode ECB CBC Fill mode NoPadding PKCS5Padding Tips Message summary characteristic Get string message summary base64 encoding Other digital summarization algorithms Get file message summary Encryption mode Encryption mode: https://docs.oracle.com/javase/8/docs/api/javax/crypto/Cipher.html ECB ECB: electroni ...

catalogue Asymmetric encryption Generate public and private keys Private key encryption Private key encryption private key decryption Private key encryption public key decryption Public key encryption and public key decryption Save public and private keys Read private key Read public key Asymmetric encryption Introduction: ① Asymme ...

introduction nothing [De1CTF2019]xorz The encryption code is as follows: from itertools import * from data import flag,plain key=flag.strip("de1ctf{").strip("}") assert(len(key)<38) salt="WeAreDe1taTeam" ki=cycle(key) si=cycle(salt) cipher = ''.join([hex(ord(p) ^ ord(next(ki)) ^ ord(next(si)))[2:].zfill(2) for p in plain]) print cipher ...

introduction Join the Nep united team, and get busy again [NCTF2019]easyRSA The encryption code is as follows: from flag import flag e = 0x1337 p = 1991386778237438373399275201576078200297465745577465490949214882928772265091983150160189193852597812381484028333160336349681632761989992793278279018794264296646743588440844918305432716251472809 ...

Realize the working mode of DES 1, Experimental purpose Master the working principle of DES algorithm; Familiar with the working mode of packet encryption algorithm. 2, Experimental principle Basic principle of DES ppop has three entry parameters: key, data and mode. Key is the key used for encryption and decryption, data is the encrypt ...

Realize the working mode of DES 1, Experimental purpose Master the working principle of DES algorithm; Familiar with the working mode of packet encryption algorithm. 2, Experimental principle Basic principle of DES ppop has three entry parameters: key, data and mode. Key is the key used for encryption and decryption, data is the encrypt ...