Tools and Open Source

Overview

Overview of libraries in Wikipedia

CryptTool

CryptTool Wikipedia

CryptTool.org

CrypTool 1 (CT1) was released in 1998 and runs under Windows and has two successors: CT2 and JCT.
CrypTool 2 (CT2) supports visual programming and execution of cascades of cryptographic procedures. CT2 contains a large number of cryptanalysis methods and also runs under Windows.
JCrypTool (JCT) is platform-independent and runs under Linux, Mac and Windows. One focus are post-quantum (signature) algorithms.
CrypTool-Online (CTO) was released in spring 2009. Runs in a browser

TPM

Trusted Platform Module (ISO/IEC 11889) is a standard for a secure cryptoprocessor, to secure hardware through integrated cryptographic keys. Each TPM chip has a unique and secret Endorsement Key (EK) burned in as it is produced.

TPM - Wikipedia
Trusted Platform Module provides

Hardware random number generator
Facilities for the secure generation of cryptographic keys for limited uses
Remote attestation: Creates a hash key summary of the hardware and software configuration. This allows a third party to verify that the software has not been changed.
Binding: Encrypts data using the TPM bind key, a unique RSA key descended from a storage key
Sealing: Similar to binding, but in addition, specifies the TPM state for the data to be decrypted
Other Trusted Computing functions for the data to be decrypted

TPM Linux

PDF security

Didier Stevens blog - PDF tools
pdf-insecurity.org - RUB - Joerg Schwenck

Tutanota

Basics

German start-up, Hannover. Works on PQmail as well.

tutanota

Services

Cloud Signature Consortium - and its members
Signius - remote signature services, based on Cryptomathic
Connective - Antwerp

PGP - GPG

Basics

Pretty Good Privacy (PGP) introduced a decentralised model of trust based on public keys and certificates. PGP is software built as an e-mail encryption tool by Phil Zimmermann, where parties are represented by their public key. Its message format is described in RFC 4880.

gnupg.org - GPG/GnuPG

GnuPG is a command line tool without any graphical user interface. It is an universal crypto engine which can be used directly from a command line prompt, from shell scripts, or from other programs.

On Linux

Gnome Keyring

a collection of components in GNOME that store secrets, passwords, keys, certificates and make them available to applications
integrated with the user's login, so that secret storage can be unlocked when the user logs in
based on PKCS#11

Gnome Seahorse - an application for managing PGP and SSH keys and passwords in the GNOME Keyring

Gnome Seahorse gitlab

GPG in Evolution

Key generation either through Seahorse or by 'gpg2 –full-gen-key'

On Windows

gpg4win.org - GPG for Windows - email and file encryption

Installs locally at C:\Program Files (x86)\GnuPG\bin
Sign files or folders from Windows Explorer with GpgEX or Kleopatra
Comes with Microsoft Outlook plugin GpgOL to sign and encrypt emails and attachments. Verification and decrytion directly in Outlook.
Executable gpg4win-3.1.11.exe exists separately but is also part of Libre Office