This section contains answers to frequently asked questions. If you cannot find the answer to your question, please contact us.
Q.: Why use four different encryption algorithms? Which is worse or better?
A.: The different encryption algorithms are used so that the attacker does not know which algorithm to break (as the encrypted file does not use a header). This forces the attacker to go through all possible combinations of algorithms. All algorithms used (AES, Serpent, Twofish, Camellia) are unbreakable. The key length for each algorithm is 256 bits.
Q.: Are passwords stored anywhere on the remote server?
A.: Encryption keys are never transmitted over the network and are not stored locally.
Q.: Is the cryptography organised securely?
A.: The Botan open source library is used to implement the cryptography.
Q.: Do I need administrator rights to run Cryptofrost?
A.: No, the installation file simply unzips a portable version of the application that can even be used from a USB flash drive.
Q.: Does the encrypted file store the hash of the decrypted file?
A.: No, the correctness of the decryption is determined by the GCM encryption mode, and the decryption itself is done by trial and error.
Q.: Why is there a 64GB limit on the size of encrypted data?
A.: This limit is imposed by the GCM encryption mode used. This is a modern secure AEAD mode of authenticated encryption, but has its own features to remain secure.
Q.: Is the application source code open?
A.: The encryption and decryption source code is available on request.
Q.: Will CryptoFrost protect against a quantum computer?
A.: An attack realised on a quantum computer will weaken the strength of symmetric encryption algorithms by a factor of 2 (using Grover’s algorithm). However, as 256-bit key length algorithms are used, the encryption will remain unbreakable.
Q.: Will my data be safe if my computer is infected with a keylogger?
A.: In such a targeted attack scenario, no existing data encryption programme can provide security.
Q.: What is KDF?
A.: To generate an encryption key from a password, special mathematical functions are used that deliberately require large computing resources. This is one of the main obstacles for an attacker trying to crack an encrypted file using brute force or a large dictionary attack. The advanced KDF algorithms used in CryptoFrost make such attacks impossible, even on a supercomputer.
Q.: What are the limitations of the program without a licence key?
A.: Without a license key, Cryptofrost works in a limited mode: you can only encrypt 4 files with it. Without a key, the program will decrypt everything previously encrypted, but to encrypt more than 4 files, you will need to purchase a license.
The differences between the trial version and the licensed version are shown in the following table
| Trial | License | |
| Encryption algorithms | Serpent | Serpent, AES, Twofish, Camellia |
| KDF algorithms | Scrypt | Scrypt, Argon2id |
| Number of encrypted files | 4 | Unlimited |
| Additional features | ||
| Pluggable header | — | + |
| Data compression | — | + |
| Key files | — | + |
| Additional entropy | — | + |
| Additional features | ||
| Secure password generator | — | + |
| File and text hash sum calculation | — | + |
Q. Why do some anti-virus programs report that a Trojan has been detected in the installer (or program)?
A.: There is no malware in the installer or application. The heuristic module of some antiviruses reacts this way to any program that uses file encryption. Add CryptFrost to your antivirus exclusion list.
Q.: How to install the license file?
A.: To activate the application, read this short manual.
Q.: What is a licence and how do I register the software?
A.: Тhe Cryptofrost software license is a digital file that we will create for you personally and send to the email address you specify within 24 hours after payment. To activate the license, save this file to disk, then open the About tab in the Cryptofrost window, click the Activate button and specify the location of this file. The License is valid for one year.
Q.: What payment methods do you accept?
A.: Currently we only accept cryptocurrencies: Bitcoin (BTC), Ethereum (ETH), Ethereum Classic (ETC), Bitcoin Cash (BCH), Monero (XMR), Litecoin (LTC), Zcash (ZEC), Dash, via the Plisio payment service. This is the most convenient way to make transactions.
Q.: How can I buy cryptocurrency?
A.: To buy cryptocurrency, you can use these instructions.
Q.: Why is there no registration page on the site?
A.: New user registration is done automatically when you purchase a Cryptofrost licence key. Account access information will be sent to the email address you provide.