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HSM Kit

Free Online Encryption & Key Management Tools

A comprehensive suite of cryptographic tools for security professionals. All calculations are performed client-side in your browser — your data never leaves your device.
All (44)Symmetric (3)Asymmetric (4)Payment (29)Encoding (5)Hashing (3)

🔧 Most Popular Tools

AES Encryption
Encrypt and decrypt data using AES-128/192/256 with ECB, CBC, CFB, OFB, CTR modes.
DES/3DES Encryption
DES and Triple DES encryption with multiple padding options for legacy systems.
Format-Preserving Encryption
FPE (FF1/FF3-1) for encrypting data while preserving format and length.
RSA Encryption
RSA asymmetric encryption, decryption, digital signing and verification.
ECC/ECDSA
Elliptic Curve Cryptography for compact keys and efficient digital signatures.
RSA DER Public Key
Encode/decode RSA public keys between modulus/exponent and DER format.
SSL Certificates
Generate RSA keys, create CSRs, self-signed X.509 certificates, and parse certificates.
TR-31 Key Block
Encode and decode TR-31/ANSI X9.143 key blocks with KBPK protection. Supports TDES and AES versions.
PIN Blocks General
Encode and decode PIN Blocks in all ISO 9564 formats (0, 1, 2, 3, 4) with PAN.
PIN Blocks AES
AES-128 encryption/decryption of ISO 9564 Format 4 PIN Blocks with 32 hex output.
PIN Offset
Calculate and verify PIN offset using IBM 3624 method with validation data.
PIN PVV
Visa PIN Verification Value (PVV) calculation and PIN verification with PDK/PVKI.
VISA Certificates
Validate VISA issuer certificates with VSDC CA V92/V94 and custom CA keys.
Key Generator
Generate secure random keys for AES, DES, 3DES. Key combination and parity tools.
Keyshare Generator
Generate key shares for secure key splitting and component management with KCV.
Futurex Keys
Futurex HSM key encryption, decryption and lookup with multiple variants.
Atalla Keys (AKB)
Atalla AKB format key encryption and decryption with MFK and MAC verification.
SafeNet Keys
SafeNet HSM key encryption, decryption and lookup with KM key variants.
Thales Keys
Thales HSM LMK key encryption, decryption and lookup with variants.
Thales Key Block
Encode and decode Thales proprietary key blocks with KBPK protection.
ISO8583 Bitmap
Encode and decode ISO 8583 bitmaps for payment messages. Primary and secondary bitmaps supported.
CVV/CVC
Generate and validate CVV, iCVV, CVV2, dCVV for card verification and payment security.
AMEX CSC
Generate and validate AMEX Card Security Codes (CSC-5, CSC-4, CSC-3) for American Express.
MasterCard CVC3
Generate dynamic CVC3 for MasterCard contactless EMV transactions.
AS2805 Message Tools
Australian ISO 8583 payment tools with key generation, PIN block translation, and MAC calculation.
ANSI MAC (X9.9 & X9.19)
ANSI X9.9/X9.19 MAC with DES CBC-MAC or 3DES encryption.
AS2805 MAC
AS2805.4.1 MAC for Australian EFTPOS with Method 1 and Method 2.
TDES CBC-MAC
Triple DES CBC-MAC with 2-key/3-key TDES and ISO 9797-1 padding.
HMAC
Hash-based MAC using SHA-256/SHA-512 for API authentication and data integrity.
CMAC
NIST SP 800-38B cipher-based MAC with AES/TDES and CMAC-96.
Retail MAC
ISO 9797-1 Method 2 Retail MAC with DES/3DES for POS and ATM systems.
ISO 9797-1 MAC
ISO/IEC 9797-1 MAC calculator with algorithms 1-6 and multiple padding methods.
ZKA
German banking standard with session key derivation, PIN encryption, and MAC calculation.
Message Parser
Parse ATM NDC, Wincor, and ISO 8583 financial message formats.
DUKPT (ISO 9797)
Derive PEK from BDK/IPEK and KSN. Encrypt/decrypt PIN, calculate MAC, process data.
DUKPT (AES)
DUKPT with AES support (2TDEA, 3TDEA, AES-128/192/256). Derive working keys and process data.
Character Encoding
Convert between ASCII, EBCDIC, Hexadecimal, Binary, and ATM Decimal formats.
BCD Encoder/Decoder
Encode decimal to BCD or decode BCD back to decimal format.
Base64
Encode and decode data using Base64 binary-to-text encoding.
Base94
Compact encoding using all 94 printable ASCII characters.
ASN.1 Parser
Parse and analyze ASN.1 DER/BER structures, decode X.509 certificates and PKCS formats.
Hash Calculator
Calculate hash values using MD5, SHA-1, SHA-256, SHA-512, BLAKE2, and more algorithms.
Check Digits
Calculate and verify check digits using Luhn (MOD 10) and MOD 9 algorithms.
UUID Generator
Generate universally unique identifiers (UUID v1, v3, v4, v5).

✨ Why Choose HSM Kit?

🔒 100% Browser-Based
All cryptographic operations run entirely in your browser. Your keys, PINs, and sensitive data never leave your device.
🆓 Free & Open
All 44+ tools are completely free. No registration, no login, no hidden costs. Use instantly.
💼 HSM & Payment Ready
Professional tools for Thales, Futurex, Atalla, SafeNet HSMs. TR-31, KCV, PIN Block and more.

📖 About HSM Kit

• HSM Kit is a comprehensive suite of 44+ cryptographic tools designed for security professionals, developers, and anyone working with encryption and payment systems.
• All tools work entirely in your browser - zero server communication means your sensitive data, keys, and PINs never leave your device.
• Professional-grade HSM tools supporting Thales, Futurex, Atalla, and SafeNet key operations, TR-31 key blocks, and KCV calculations.
• Perfect for testing, development, and educational purposes in cryptography, payment security, and HSM key management.

Frequently Asked Questions