Kryptomat was a tools app developed by Haci. It was removed from Google Play Apr 25, 2024 and is no longer available for download.
Download Statistics
Kryptomat had been downloaded 2 thousand times before it became unavailable.
User Ratings
Kryptomat was rated 4.43 out of 5 stars, based on 26 ratings.
App Information
Kryptomat was free to download. The APK download size was 331.85 kB. The last available version was 1.2.1. The last update was on January 1, 2021.
Technical Requirements
Kryptomat required Android 2.2+ or higher. The app had a content rating of Everyone. The app had been available on Google Play February 2014.
Description
Kryptomat - The Cryptography App
With the app Kryptomat any texts can be encrypted. For encryption Kryptomat uses here the RSA algorithm. RSA (Rivest, Shamir, Adleman) is an asymmetric cryptographic method that can be used for both encryption and digital signature. In the asymmetric process, two key pairs are used, in contrast to a symmetric cryptosystem. A public key pair to encrypt data and a secret key pair to decrypt data. Data can be encrypted with the public key pair, which again only the owner of the secret key can decrypt. The communicating parties need therefore not to know a shared secret key, which contributes to increased security of the encryption. With Kryptomat texts of any length can be encrypted using the RSA method. The strength of the encryption can here be specified during encryption using the bitlength (military standard are 1024 bits) of the primes to be generated. The bitlength is, however, dependent on the available heap memory in Android. Due to this restriction key pairs could be produced with a maximum bitlength of 1023 with the devices tested so far.
Recent changes: API level 30 migration. Minor bug fixes. Editorial changes. Layout optimizations.
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★★☆☆☆
snake oil - private key not protected The private key file is not encrypted by an AES passphrase. Any app that can read storage can read the private key file and decrypt any stored ciphertext. It totally defeats the purpose of encryption if the user does not keep a secret off the device.
Technologies used by Kryptomat
Kryptomat is requesting 2 permissions and is using 0 libraries.
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