Review:
Password Hashing Algorithms
overall review score: 4.7
⭐⭐⭐⭐⭐
score is between 0 and 5
Password-hashing algorithms are cryptographic functions designed to securely convert passwords into fixed-length strings, known as hashes. Their primary purpose is to protect stored passwords in databases by making it computationally difficult for attackers to retrieve the original passwords, even if they gain access to the hash values. Commonly used algorithms include bcrypt, scrypt, PBKDF2, Argon2, and others, each incorporating mechanisms such as salting and adaptive work factors to enhance security.
Key Features
- One-way hashing: Designed to be irreversible, preventing retrieval of the original password from the hash.
- Salting: Incorporates unique random data to prevent rainbow table attacks.
- Configurable workload parameters: Allows adjusting computational effort (e.g., iteration count, memory usage) to stay ahead of hardware advancements.
- Resistance to brute-force attacks: Uses computationally intensive processes to slow down attackers.
- Support for key derivation: Can generate secure keys for authentication or encryption purposes.
Pros
- Highly effective at securing stored passwords against unauthorized access.
- Supports configurable parameters to adapt security level over time.
- Widely adopted and well-studied with proven resilience against various attack vectors.
- Incorporates mechanisms like salting and iterative hashing to mitigate common vulnerabilities.
Cons
- Require additional computational resources during authentication processes, which may impact performance.
- Implementation mistakes or weak configurations can undermine security benefits.
- Not suitable for use as a general-purpose hashing function outside password storage scenarios.
- Vulnerable if algorithms become outdated without timely updates or upgrades.