(new version 2.1 released 19 January 2015) A calculator for large natural numbers bdcalc is a calculator for the large natural numbers used in cryptography calculations
#CRYPT3 FAQ HOW TO#
We show how to use bdcalc to reproduce the IETF example test vector The Poly1305 authenticator takes a 256-bit one-time key and a message and outputs a 128-bit tag. We look at the contents of the three files in the META-INF directory This page summarises useful test vectors for the secure hash algorithms SHA-1, SHA-2 and the new SHA-3. Out of curiousity, we wrote a Python program to implement the attack in the Toy Example This page looks at the attack on XML Encryption in the paper How to break XML encryption. It looks at the common ways to encrypt all or part of an XML document This page looks at encryption in XML documents using the W3C recommendation XML Encryption Syntax and Processing. In this page we look at how to troubleshoot problems when verifying your documents Troubleshooting problems on the 'Online XML Digital Signature Verifier' site It is a replacement for the original sadly retired as of October 2022 The Online XML Digital Signature Verifier verifies XML documents signed using XML-DSIG. The Online XML Digital Signature Verifier This is a simple example of an enveloping signature where we sign a straightforward text string inside an XML document This page demonstrates how to create a digital signature in XML. Signing an XML document using XML-DSIG (Part 1) On this page we look at how to create an enveloped signature of an XML document using XML-DSIG Signing an XML document using XML-DSIG (Part 2) On this page we look at four common types of XML documents signed using XML-DSIG and techniques to identify and sign them Signing an XML document using XML-DSIG (Part 3)
In this series of pages on SPHINCS+, we take an in-depth look at the calculations required to compute a specific SPHINCS+ signature and present some background basics SPHINCS+ A stateless hash-based signature scheme
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