CrypTool 1 to generate encryption keys, sign a document, verify a signature, and extract a signature.
Before we continue, let’s recap how a signature works. A document has a unique hashed value. The hash value can be encrypted with an individual’s private key to tie the document to the holder of the private key. The encrypted hashed value is called signing a document.
The signature of the document using RSA.
Signature verification using RSA.
Signature extraction using CrypTool.
Signature hashing using SHA-1.
The stored signature using CrypTool.