Aes Encryption Key Generator C#
- .NET provides high level classes for various encryption algorithms, both symmetric and asymmetric. Advanced Encryption Standard (AES) is one of the symmetric encryption algorithms that allows both parties, sender and receiver, to use the same key to encrypt and decrypt data.
- All passwords are encrypted using a derived Advanced Encryption Standard (AES) key. The 32-byte AES key is as follows: 4e 99 06 e8 fc b6.
Definition
There are multiple ways of generating an encryption key. Most implementations rely on a random object. All examples mentioned here use a secure cryptographic randomizer. Represents the abstract base class from which all implementations of the Advanced Encryption Standard (AES) must inherit. Aes Class (System.Security.Cryptography) Microsoft Docs Skip to. The all-in-one ultimate online toolbox that generates all kind of keys! Every coder needs All Keys Generator in its favorites! It is provided for free and only supported by ads and donations. Symmetric cryptography also known as secret-key encryption is used to encrypt and decrypt data using a single secret key. Same secret key is used to encrypt and decrypt data from both parties, the sender and the receiver. Major symmetric algorithms are AES, DES, RC2, Rijndael, and TripleDES. (C#) Generate Encryption Key. Discusses symmetric encryption key generation techniques for block encryption algorithms such as AES, Blowfish.
Represents the abstract base class from which all implementations of the Advanced Encryption Standard (AES) must inherit.
- Derived
Examples
The following example demonstrates how to encrypt and decrypt sample data by using the Aes class.
Constructors
| Aes() | Initializes a new instance of the Aes class. |
Fields
| BlockSizeValue | Represents the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
| FeedbackSizeValue | Represents the feedback size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
| IVValue | Represents the initialization vector (IV) for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| KeySizeValue | Represents the size, in bits, of the secret key used by the symmetric algorithm. /windows-7-pro-key-generator-app.html. (Inherited from SymmetricAlgorithm) |
| KeyValue | Represents the secret key for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| LegalBlockSizesValue | Specifies the block sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| LegalKeySizesValue | Specifies the key sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| ModeValue | Represents the cipher mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| PaddingValue | Represents the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Properties
| BlockSize | Gets or sets the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
| FeedbackSize | Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes. (Inherited from SymmetricAlgorithm) |
| IV | Gets or sets the initialization vector (IV) for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| Key | Gets or sets the secret key for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| KeySize | Gets or sets the size, in bits, of the secret key used by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| LegalBlockSizes | Gets the block sizes, in bits, that are supported by the symmetric algorithm. |
| LegalKeySizes | Gets the key sizes, in bits, that are supported by the symmetric algorithm. |
| Mode | Gets or sets the mode for operation of the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
| Padding | Gets or sets the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Methods
| Clear() | Releases all resources used by the SymmetricAlgorithm class. (Inherited from SymmetricAlgorithm) |
| Create() | Creates a cryptographic object that is used to perform the symmetric algorithm. |
| Create(String) | Creates a cryptographic object that specifies the implementation of AES to use to perform the symmetric algorithm. |
| CreateDecryptor() | Creates a symmetric decryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
| CreateDecryptor(Byte[], Byte[]) | When overridden in a derived class, creates a symmetric decryptor object with the specified Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
| CreateEncryptor() | Creates a symmetric encryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
| CreateEncryptor(Byte[], Byte[]) | When overridden in a derived class, creates a symmetric encryptor object with the specified Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
| Dispose() | Releases all resources used by the current instance of the SymmetricAlgorithm class. (Inherited from SymmetricAlgorithm) |
| Dispose(Boolean) | Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources. (Inherited from SymmetricAlgorithm) |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GenerateIV() | When overridden in a derived class, generates a random initialization vector (IV) to use for the algorithm. (Inherited from SymmetricAlgorithm) |
| GenerateKey() | When overridden in a derived class, generates a random key (Key) to use for the algorithm. (Inherited from SymmetricAlgorithm) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object) |
| GetType() | Gets the Type of the current instance. (Inherited from Object) |
| MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object) |
| ToString() | Returns a string that represents the current object. (Inherited from Object) |
| ValidKeySize(Int32) | Determines whether the specified key size is valid for the current algorithm. (Inherited from SymmetricAlgorithm) |
Explicit Interface Implementations
| IDisposable.Dispose() | Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources. (Inherited from SymmetricAlgorithm) |
Applies to
-->Creating and managing keys is an important part of the cryptographic process. Symmetric algorithms require the creation of a key and an initialization vector (IV). The key must be kept secret from anyone who should not decrypt your data. The IV does not have to be secret, but should be changed for each session. Asymmetric algorithms require the creation of a public key and a private key. The public key can be made public to anyone, while the private key must known only by the party who will decrypt the data encrypted with the public key. This section describes how to generate and manage keys for both symmetric and asymmetric algorithms.
Symmetric Keys
The symmetric encryption classes supplied by the .NET Framework require a key and a new initialization vector (IV) to encrypt and decrypt data. Whenever you create a new instance of one of the managed symmetric cryptographic classes using the parameterless constructor, a new key and IV are automatically created. Anyone that you allow to decrypt your data must possess the same key and IV and use the same algorithm. Generally, a new key and IV should be created for every session, and neither the key nor IV should be stored for use in a later session.
To communicate a symmetric key and IV to a remote party, you would usually encrypt the symmetric key by using asymmetric encryption. Sending the key across an insecure network without encrypting it is unsafe, because anyone who intercepts the key and IV can then decrypt your data. For more information about exchanging data by using encryption, see Creating a Cryptographic Scheme.
Random Aes Key Generator
The following example shows the creation of a new instance of the TripleDESCryptoServiceProvider class that implements the TripleDES algorithm.
When the previous code is executed, a new key and IV are generated and placed in the Key and IV properties, respectively.
Sometimes you might need to generate multiple keys. In this situation, you can create a new instance of a class that implements a symmetric algorithm and then create a new key and IV by calling the GenerateKey and GenerateIV methods. The following code example illustrates how to create new keys and IVs after a new instance of the symmetric cryptographic class has been made.
When the previous code is executed, a key and IV are generated when the new instance of TripleDESCryptoServiceProvider is made. Another key and IV are created when the GenerateKey and GenerateIV methods are called.
Asymmetric Keys
The .NET Framework provides the RSACryptoServiceProvider and DSACryptoServiceProvider classes for asymmetric encryption. These classes create a public/private key pair when you use the parameterless constructor to create a new instance. Asymmetric keys can be either stored for use in multiple sessions or generated for one session only. While the public key can be made generally available, the private key should be closely guarded.
A public/private key pair is generated whenever a new instance of an asymmetric algorithm class is created. After a new instance of the class is created, the key information can be extracted using one of two methods:
The ToXmlString method, which returns an XML representation of the key information.
The ExportParameters method, which returns an RSAParameters structure that holds the key information.
Both methods accept a Boolean value that indicates whether to return only the public key information or to return both the public-key and the private-key information. An RSACryptoServiceProvider class can be initialized to the value of an RSAParameters structure by using the ImportParameters method.
Asymmetric private keys should never be stored verbatim or in plain text on the local computer. If you need to store a private key, you should use a key container. For more on how to store a private key in a key container, see How to: Store Asymmetric Keys in a Key Container.
The following code example creates a new instance of the RSACryptoServiceProvider class, creating a public/private key pair, and saves the public key information to an RSAParameters structure.