Hashing and Digital Signatures

What is a cryptographic hash?

• A method to encrypt data for secure transmission.

• A short, fixed-size string of text representing data, impossible to reverse.

• A reversible encryption algorithm used for data compression.

• A digital signature used to authenticate user identity.

What is a hash collision?

• When two identical inputs produce different hash values.

• When a hash function fails to produce any output.

• When two different inputs produce the same hash value.

• When a hash value is successfully decrypted back to its original message.

What is the primary purpose of adding "salt" to a password when hashing?

• To encrypt the password for secure storage.

• To make brute-force attacks faster.

• To prevent rainbow table attacks.

• To reduce the length of the hash.

Which key is used to sign a digital document to create a digital signature?

• The sender's public key.

• The receiver's private key.

• The sender's private key.

• A symmetric key.