Category Archives: public key exchange

WanaCryptor File Encryption and Decryption

Introduction This is a quick post about the WanaCryptor ransomware wreaking havoc on many networks across the world this weekend. With all the news coverage, most of you already know the trouble caused by it. Once executed on a system, … Continue reading

Posted in cryptography, encryption, malware, public key exchange, security, windows | Tagged , , , , , , , , | 8 Comments

Shellcode: A Windows PIC using RSA-2048 key exchange, AES-256, SHA-3

Introduction This won’t be a tutorial on writing shellcode although you might glean something useful from the source code when writing your own PIC in C. This is a PIC (Position Independent Code) for the Windows Operating System written in … Continue reading

Posted in assembly, cryptography, diffie hellman merkle, networking, programming, public key exchange, security, shellcode, windows | Tagged , , , , , , , | 1 Comment

SPEKE (Simple Password Exponential Key Exchange) using OpenSSL

Introduction David P. Jablon published a paper in 1996 called Strong Password-Only Authenticated Key Exchange where he describes a new protocol based on Diffie-Hellman-Merkle key exchange. Diffie-Hellman key exchange is susceptible to MITM attack but with just Modular Multiplication and … Continue reading

Posted in bspeke, cryptography, diffie hellman merkle, encryption, key exchange protocol, oakley groups, openssl, prime numbers, programming, public key exchange, security, speke, wspeke | Leave a comment