Question: A digital signature is a way to securely sign a document. That is, it is a way to put your "signature" on a document so that anyone reading it knows that it is you who have signed it, but no one else can "forge" your signature. The document itself may be public; it is your signature that we are trying to protect. Digital signatures are, in a way, the opposite of encryption, as if Bob wants to sign a message, he first applies his signature to it (think of this as encryption) and then the rest of the world can easily read it (think of this as decryption). Explain, in detail, how to achieve digital signatures, using ideas similar to those used for RSA. In particular, anyone who has the document and has your signature of the document (and knows your public key) should be able to determine that you signed it?