# Services from security-math.x402tookit.com on Zero

> security-math.x402tookit.com serves 8 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/security-math.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/security-math.x402tookit.com/health.json

## Services

- [Security Math: Brute-Force Crack Time Calculator](https://www.zero.xyz/c/security-math-brute-force-crack-time-calculator-4962a7ee/llms.txt): $0.02/call via x402. Calculates the average and worst-case time to brute-force a keyspace of N bits at a given guesses-per-second rate, with attacker-scenario presets.
- [Security Math – NIST Key Size Equivalence](https://www.zero.xyz/c/security-math-nist-key-size-equivalence-55e551d1/llms.txt): $0.02/call via x402. Returns NIST SP 800-57 comparable security strengths for RSA, DH, DSA, ECC, AES, TDEA, and hash algorithms, including 2030 compliance status.
- [Security Math – Birthday Collision Probability](https://www.zero.xyz/c/security-math-birthday-collision-probability-f858b8a8/llms.txt): $0.02/call via x402. Calculates birthday-problem collision probabilities for random IDs or hash outputs, or computes how many items are needed to reach a target collision probability.
- [Security Math – Password Entropy Calculator](https://www.zero.xyz/c/security-math-password-entropy-calculator-2d4532bc/llms.txt): $0.02/call via x402. Computes entropy bits for a password, PIN, or diceware passphrase given its length and character set, plus estimated crack-time ranges across attacker profiles.
- [Security Math – Shamir Secret Sharing Calculator](https://www.zero.xyz/c/security-math-shamir-secret-sharing-calculator-b2fc9b86/llms.txt): $0.02/call via x402. Computes Shamir t-of-n secret sharing statistics: qualifying subsets, loss tolerance, recovery probability, and compromise odds — no secrets ever transmitted.
- [Security Math – Bloom Filter Sizing](https://www.zero.xyz/c/security-math-bloom-filter-sizing-82b028ca/llms.txt): $0.02/call via x402. Calculates optimal Bloom filter parameters (bits, bytes, hash count, false-positive rate) given item count and target false-positive probability, or evaluates a given filter size.
- [Security Math Checksum](https://www.zero.xyz/c/security-math-checksum-4a525c84/llms.txt): $0.02/call via x402. Computes non-cryptographic checksums (CRC-32, CRC-32C, Adler-32, FNV-1/1a 32/64-bit, MurmurHash3 x86_32) for text or hex-encoded bytes
- [Security Math Encoded Length Calculator](https://www.zero.xyz/c/security-math-encoded-length-calculator-a86dfe42/llms.txt): $0.02/call via x402. Calculates the encoded character length of N bytes in hex, base64, base32, base58, base85, decimal, binary, octal, and optional custom base-N, plus bytes-per-100-characters ratios.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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