Reliable, strong, safe. This is the iOS version of Gwaidigo. Gwaidigo is a general purpose cryptography tool that can be used to encrypt, decrypt email, file, sign and verify files. It was designedly developed as the next generation of the daily cryptography tool because the RSA based on cryptography algorithm is almost out of date. The internal details of Gwaidigo was completely hidden and has builtin multiple cryptography layers for inner data protect that makes it very strong. As a public key crypto-system used for secure file and message transmission, it adopted a customised version of the stable and reliable ECC (Elliptic Curve Cryptography) algorithm used by bitcoin to guarantee the reliableness of the software. The format of the Gwaidigo's public key is NOT public that makes the entire system very strong and very difficult for reverse engineering. Gwaidigo is an encryption and decryption system based on industry strength that can ensure the complete security of business negotiations or personal messages. It was developed to make the daily cryptography works on iOS easy and efficient. Why ------------------ The most difference between "public key cryptography" and normal "password protected cryptography" is that the first approach don't ask you to distribute any password to anyone or any unsafe place, e.g email, chat app, or internet. And, you need an encryption tool that has industrial strength to protect your confidential information. General Features ------------------ * Group and key pair management. * Easily manage hundreds of contacts by company and department. * Setup recipients by a tap on group without tap them one by one, easily organise dozens of recipients for email message. * Encrypt, decrypt email and file just requires several taps, it's very efficient, convenient and simple. * Efficiently manage local files by rename, cut, copy, paste, and duplicate operations. * Easily manage multiple primary key that helps switching between different master identities. * Without complex configuration, double boring questions. Basic Usage ------------------ You don't need to know more about public key encryption at all, you can get industry strength information protection with just a few simple steps. 1. Generate a key pair for yourself. Carefully keeping your private key (security key) and never leak to others. 2. Distribute your public key. Send your public key to others then they can use it to encrypt email or file for you. 3. Import other people's public key. Encrypt email or file with others people's public keys. 4. Decrypt message or file with your own private key. Common Tasks ------------------ a. list all groups, list all member of a group. b. encrypt and decrypt a file. c. set up recipients and then encrypt an email, decrypt an encrypted email. d. sign and verify file. Why another cryptography tool? There should have another cryptography utility that does not adopt RSA algorithm and has industrial strength to protect user confidential information.