https://netacoding.com/tags/xor/ Recent content in XOR on Netacoding | Cybersecurity, Assembly & Network Research https://netacoding.com/img/logo-netacoding.png https://netacoding.com/img/logo-netacoding.png Hugo en-us Thu, 08 Oct 2026 00:00:00 +0000 https://netacoding.com/posts/xor-operations-x64-assembly/ Thu, 08 Oct 2026 00:00:00 +0000 https://netacoding.com/posts/xor-operations-x64-assembly/ Two complete NASM implementations of XOR stream encryption — fixed single-byte key and rolling key that increments every byte — with file read, in-place encrypt, and stdout write, all via raw Linux syscalls. Covers the symmetry property that makes decrypt identical to encrypt, 8-bit register auto wrap-around, and a real pointer bug: mov rdx, [buffer] loads the file data as an address and segfaults, while lea rdx, [buffer] loads the address correctly.