Crypto - The unique cryptography app with numerous & useful features
Suitable for learning, testing & applying.

Explore cryptography - the magic behind cryptocurrencies like Bitcoin or Ethereum. Now with Blockchain related features. More coming soon!

Features
• Encryption
• Hashing
• Encoding/Decoding
• Mathematical functions
• Secure Communication Tools (Certificates & Key Exchange)
• Analysis
• Tools

This makes Crypto unique:
• Beautiful & modern Material Design
• Useful implemented features
• Info pages for a lot of functions (implementation details etc.)
• Sharing/Copy-pasting your texts & content made very easy & powerful
• Save frequently used functions as favorites
• Powerful Secure Communication Tools as an approach to provide secure encryption as a security add-on for every untrusted messaging or email service

Cryptographic functions
Encryption
• Caesar
• Vigenère
• Skytale
• DES
• AES
• Blowfish
• Twofish
• RC4
• Salsa20
• ChaCha

Analysis Functions
• Frequency Analysis
• Caesar Brute Force
• Factorization
• Prime Search
• Find Divisors
• Convert RSA modulus
• Decode PEM certificate

Asymmetric Methods
• Diffie Hellman
• RSA
• DSA
• El Gamal

Mathematics
• Prime test (Fermat, Miller Rabin)
• Euler toitent function
• GCD (Euklid) & Multiplicative Inverse in a Field

Hash
• MD2
• MD4
• MD5
• RIPEMD
• SHA-1
• SHA-2
• SHA-3
• Tiger
• Whirlpool
• Gost3411

HMAC - Keyed-Hash Message Authentication Code
• MD2
• MD4
• MD5
• SHA1
• SHA2
• Tiger
• Whirlpool
• Gost3411

MAC - Message Authentication Code
• Skein
• Poly1305
• CMAC

KDF - Key Derivation Function
• HKDF
• Scrypt

Encoding
• Base64
• Base58
• Hexadecimal
• Binary
• URL

Decoding
• Base64
• Base58
• Hexadecimal
• URL

Tools
• Export your PEM certificate(.pem .crt .cert .cer)
• QR code generator
• QR code decoder
• Advanced Base64 Encoding/Decoding
• Bitcoin Address Generator

Secure Communication Tools
• Authentication (RSA certificates)
• Key Exchange (RSA Public Key Block Cipher Encryption)
• Encryption (AES-256)

What can you do with Crypto?
• Encrypt your messages for WhatsApp, Facebook, Telegram and other messengers
• Encrypt your texts to securely store or send them
• Save your passwords as hash
• Learning support with mathematical DH and RSA implementations
• Mathematical functions also suitable as everyday helpers

Some special use cases for Secure Communication Tools:
RSA Certificates
• Share your certificate to prove your identity
• You can securely & easily exchange secrets, passwords or session keys with RSA public keys included in the certificates

RSA Key Exchange
• Transfer your bank account number securely
• Share access codes (e.g. PDF passwords, Cloud access passwords) securely
• Exchange a session key for AES Encryption

AES Encryption
• Encrypt your text messages securely and share them (AES recommended instead of RSA because of performance)


Feedback
If you have any problems, suggestions or questions, please email to cryptotools.app@gmail.com

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If there is anything you don't like about this app, please tell me what it is and why.