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ELGAMAL Encryption/Decryption

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Generate ELGAML Keys160 bit 320 bit

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Encrypt Message

Decrypt Message

Public Key -----BEGIN PUBLIC KEY----- MFIwNwYGKw4HAgEBMC0CFQChlZKfVck+HgitSzy4R2XECXmQVwIUK3QLnPTFlJee WkGDWrZE3HbmVK8DFwACFHBu4nqbXW1KoFk3pxPXRm/2ywDn -----END PUBLIC KEY-----

Private Key -----BEGIN PRIVATE KEY----- MFUCAQAwNwYGKw4HAgEBMC0CFQChlZKfVck+HgitSzy4R2XECXmQVwIUK3QLnPTFlJeeWkGDWrZE 3HbmVK8EFwIVAIoImcTNDtSTic226V+M+iF/prHL -----END PRIVATE KEY-----

ClearText Message

ELGAMAL

ELGAMAL/ECB/PKCS1PADDING

ELGAMAL/ECB/PKCS1PADDING

ELGAMAL/PKCS1

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Instead of directly asking for donations, I'm thrilled to offer you all nine of my books for just $9 on leanpub By grabbing this bundle you not only help cover my coffee, beer, and Amazon bills but also play a crucial role in advancing and refining this project. Your contribution is indispensable, and I'm genuinely grateful for your involvement in this journey!

Any private key value that you enter or we generate is not stored on this site, this tool is provided via an HTTPS URL to ensure that private keys cannot be stolen, for extra security run this software on your network, no cloud dependency

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The ELGAML Algorithm

The ElGamal cryptosystem is usually used in a hybrid cryptosystem. I.e., the message itself is encrypted using a symmetric cryptosystem and ElGamal is then used to encrypt the key used for the symmetric cryptosystem. This is because asymmetric cryptosystems like Elgamal are usually slower than symmetric ones for the same level of security, so it is faster to encrypt the symmetric key (which most of the time is quite small if compared to the size of the message) with Elgamal and the message (which can be arbitrarily large) with a symmetric cipher

Elliptic curve cryptography (ECC) is a public-key cryptography system which is based
on discrete logarithms structure of elliptic curves over finite fields. ECC is known for smaller key sizes, faster encryption, better security and more efficient implementations for the same security level as compared to other public cryptography systems (like RSA). ECC can be used for encryption (e.g Elgamal), secure key exchange (ECC Diffie-Hellman) and also for authentication and verification of digital signatures

1024 bit RSA vs 160 bit elliptic curves are the same security level)

ElGamal encryption produces a 2:1 expansion in size from plaintext to ciphertext.