Calculate Common Vulnerability Scoring System (CVSS v3.1) Base Score, qualitative severity ratings, and generate official vector strings for security triage.

Calculate exact Shannon information entropy (bits/symbol), Hartley pool entropy, min-entropy, and cracking time estimates across GPUs and supercomputers.

Configure and simulate Cross-Origin Resource Sharing (CORS) HTTP headers (Access-Control-Allow-Origin, Methods, Headers, Credentials, Max-Age) for APIs.

Build, configure, and validate modern W3C Content Security Policy (CSP Level 3) HTTP response headers to defeat Cross-Site Scripting (XSS) and data exfiltration.

Conceal and extract secret messages inside PNG images using pure client-side Least Significant Bit (LSB) steganography with optional encryption.

Calculate IPv4 subnets, network address, broadcast address, wildcard mask, and usable IP host ranges with instant CIDR prefix calculation.

Aggregate multiple IP subnets into optimal CIDR supernet routes. Calculate bitwise binary common prefixes, wildcard masks, route table compression, and Cisco/Juniper configs.

Generate and validate cryptographically secure 12, 15, 18, 21, and 24-word BIP-39 mnemonic seed phrases with PBKDF2 seed derivation for Bitcoin and Web3 wallets.

Generate Argon2id, Argon2i, and Argon2d password hashes, tune memory cost (m), time cost (t), parallelism (p), and calculate GPU resistance metrics.

Encrypt and decrypt text using AES-GCM and AES-CBC (128, 192, 256-bit) client-side with native Web Cryptography API and automatic cryptographic IV generation.