Generate Encryption Key Blackberry Curve

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  1. Generate Encryption Key Blackberry Curve 2
  2. Generate Encryption Key Blackberry Curve 2
  3. Encryption Key Generator
  4. Openssl Elliptic Curve Encryption
Encryption

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  1. Apr 25, 2017  Java based BlackBerry smartphones that run BlackBerry Device Software 4.0 to 5.0. Use an Elliptic Curve Cryptography (ECC) public key to encrypt data that the BlackBerry smartphone receives when it is locked. If media card encryption is turned on, the BlackBerry smartphone encrypts its external file system, but the administrator.
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In this chapter we will introduce the rather new Elliptic Curve Cryptography (ECC or EC for short) OpenPGP keys.

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1. What are Elliptic Curve OpenPGP keys?
2. Example code
3. Compatibility Notes
4. Async code

What are Elliptic Curve OpenPGP keys?

ECC keys are rather new to the OpenPGP standard. They were first defined in RFC 6637. This extension of the OpenPGP standard defines only three NIST approved curves. Later the open source GnuPG software added three Brainpool curves (defined in RFC 5639).

Encryption with EC keys is based on the Elliptic Curve Diffie-Hellman (ECDH) key agreement protocol. Signing with EC keys is based on the Elliptic Curve DSA (ECDSA) algorithm.

The encryption with EC OpenPGP keys is considered to be much more secure compared to the current RSA and Elgamal (DH/DSS) keys.

Supported EC curves

Currently, DidiSoft OpenPGP library for .NET supports ECC keys based on these elliptic curves:

  • NIST P-256 (DidiSoft.Pgp.EcCurve.P256)
  • NIST-384 (DidiSoft.Pgp.EcCurve.P384)
  • NIST-521 (DidiSoft.Pgp.EcCurve.P521)
  • Brainpool 256 bit (DidiSoft.Pgp.EcCurve.Brainpool256)
  • Brainpool 384 bit (DidiSoft.Pgp.EcCurve.Brainpool384)
  • Brainpool 512 bit (DidiSoft.Pgp.EcCurve.Brainpool512)

Key generation speed

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The key generation of EC keys is much faster compared to the traditional RSA and DH/DSS keys.

Example Code

The key generation is invoked by the methods GenerateEccKeyPair defined in the KeyStore and PGPKeyPair classes.

Below is a short example that illustrates how to generate EC OpenPGP keys with the library.

Generate Encryption Key Blackberry Curve 2

C# example

VB.NET example

The example code above will generate keys with no expiration date and predefined preferred algorithms for compression, hash function, and symmetric encryption. If you wish to specify manually those algorithms, please check one of the overloaded versions of the method GenerateEccKeyPair.

Generate Encryption Key Blackberry Curve 2

After the key generation, the keys can be exported from the KeyStore or you can directly generate a key in a PGPKeyPair object and export them from there.

Compatibility Issues

Encryption Key Generator

Generate public key from private key keytool download. ECC OpenPGP keys were first introduced in version 1.7.7 of DidiSoft OpenPGP Library for .NET

Elliptic curves OpenPGP keys are supported only by newer OpenPGP implementations like is Symantec (r) PGP Command line v. 10.2. and upper versions and GnuPGversion 2.1 and above. Attempts to use ECC OpenPGP keys with older software usually fails with error messages. For example, if you try to use such keys with older versions of our library you will receive exceptions with the message: “unknown PGP public key algorithm encountered“.

Async support

In order to create a key pair asynchronously, we have to use the DidiSoft.Pgp.KeyStoreAsync class which provides the same key creation methods with Async suffixes.

Summary

In this chapter, we have introduced the Elliptic Curve (EC) OpenPGP keys. The EC OpenPGP keys are still not adopted by the major OpenPGP software implementations but they will hopefully get traction soon.

Openssl Elliptic Curve Encryption

They are considered superior by terms of cryptography security to the currently widespread RSA and DH/DSS keys.