Bcrypt & Argon2 Password Hashing Cost & Latency Calculator
Balance password security against server login throughput: calculate Bcrypt work factor rounds, Argon2id memory & iteration latency, and maximum logins/sec to prevent authentication DoS.
Hashing Algorithm & Server Parameters
cores
2^cost iterations
8 (Fast / Weak)
10 (Legacy Min)
12 (OWASP 2026 Rec)
14 (Heavy)
16 (Extreme)
req/s
Security & Performance Balance
OWASP RECOMMENDED
Verification Latency per Hash
280 ms
4,096 iterations (2^12)
Max Server Auth Capacity
14.3 logins/sec
Across 4 dedicated CPU cores
Single-Core Throughput
3.6 logins/s
100% CPU bound worker
CPU Utilization at Peak
105.0%
High DoS vulnerability!
Offline Brute-Force Defense Analysis
GPU Cracking Resistance:
Moderate (ASIC vulnerable)
Memory Hardness:
4 KB (Low - CPU Cache only)
OWASP 2026 Assessment:
Meets Minimum Baseline
Implementation Configuration Snippet
// Node.js bcrypt
const bcrypt = require('bcrypt');
const hash = await bcrypt.hash(password, 12);
const bcrypt = require('bcrypt');
const hash = await bcrypt.hash(password, 12);