After gaining access to the password hashes used to protect access to a web based application, knowledge of which cryptographic algorithms would be useful to gain access to the application?

SHA1 is a cryptographic hash function used to store password hashes. An attacker who obtains the hash file can use SHA1 knowledge to precompute rainbow tables or perform brute-force attacks, comparing hashed guesses against the stolen hashes to recover plaintext passwords. The other options are encryption or key exchange algorithms, not hashing algorithms used for password storage.

Diffie-Hellman is a key exchange protocol used to establish shared secrets, not a password hashing algorithm.

RSA is an asymmetric encryption algorithm used for encryption and digital signatures, not for hashing passwords.

AES is a symmetric encryption cipher, not a hashing algorithm, and is not used to protect password storage in this context.