Informatics

FIFO profit’s stock sell calculation with LibreOffice Calc

The generalisation of spreadsheets use nowadays sometimes hides the fact that these tools aren’t good enough for every imaginable data manipulation. Sometimes people tweak and twist cells in order to achieve results that are simply beyond the possibilities of a spreadsheet application, no matter how powerful. For these occasions, R is probably more suitable. Anyway, … Continue reading

Informatics

statistics circle for analysing byte entropy in files

In a previous post I introduced triops, a multiplatform cmdline encryption tool using CHACHA20 algorithm. In general, any encryption algorithm should produce a reasonably high entropic output no matter the input (plain text) at hand — this is in order to be aligned with concepts like Entropic security and Semantic security, very important in modern … Continue reading

Informatics

triops: a multiplatform cmdline encryption tool using CHACHA + KECCAK

I’ve developed in C a simple command line tool for encryption/decryption of files, which I have named triops. It uses CHACHA20 as algorithm for encryption/decryption and KECCAK-512 as hash algorithm. Source code is available at github. Check github for latest changes! Executables for some platforms (linux, Windows, HP-UX, Solaris, and Android) are available here. For … Continue reading