A digital signature is . a. created by hashing a document and then encrypting the hash with the signer’s private key b. created by hashing a document and then encrypting the hash with the signer’s...

a. created by hashing a document and then encrypting the hash with the signer’s private key

b. created by hashing a document and then encrypting the hash with the signer’s public key

c. created by hashing a document and then encrypting the hash with the signer’s symmetric key

d. none of the above