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Hill Cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which it was practical (though barely) to operate on more than three symbols at once. It used matrices and matrix multiplication to mix up the plaintext. [Wikipedia]

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Random Password & Key Generator

Random Password & Key Generator offers a variety of randomly generated keys and passwords that you can use to secure any application, service, or device.

Link Lock

Link Lock is an online encrypting and decrypting tool for adding a password to a link or a web page; in other words, for encrypting and decrypting URLs. When a user visits an encrypted URL, they will be prompted to enter a password.

Punycode Encode & Decode

Punycode Encoder & Decoder is an encoding tool that can convert internationalized domain names (IDN) and Punycode encoding in DNS, addressing the issue of DNS systems only supporting English-language domain name resolution.

Cetacean Cipher

Cetacean Cipher is an interesting encryption algorithm that it can converts any input into "Cetacean Language".

Hill Cipher