Final answer:
The default Password Hash Algorithm used by NTLMv2 is SHA-1 (Secure Hash Algorithm 1). Thus, option C is correct.
Step-by-step explanation:
NTLM (NT LAN Manager) is a suite of Microsoft security protocols that provides authentication, integrity, and confidentiality to users. NTLMv2, an improvement over its predecessor NTLM, enhances security features, including the hashing algorithm used for password storage.
In NTLMv2, the default Password Hash Algorithm is SHA-1. SHA-1 is a cryptographic hash function that produces a 160-bit (20-byte) hash value, typically rendered as a 40-character hexadecimal number. It is designed to be a secure algorithm for producing a fixed-size hash based on the input data, making it computationally infeasible to generate the same hash from different input data or to reconstruct the original input from the hash.
While SHA-1 was once considered secure, vulnerabilities have been identified over time, and it is now recommended to use stronger hash functions such as SHA-256 or SHA-3 for enhanced security.