Private key or shared secret: Choose JWS signature algorithm and default value: Or specify signature algorithm, private key, private key passcode and/or shared secret: passcode for private key: NOTE: Off course you can set your own private key and passcode. Please care of proper signature algorithm when you set your own key and pass code. Key generation is the process of generating keys in cryptography.A key is used to encrypt and decrypt whatever data is being encrypted/decrypted. A device or program used to generate keys is called a key generator or keygen.
The simplest kind of JSON Web Encryption (JWE) is directencryption with a symmetricAES key, hence the algorithm designation dir. Sender and recipient mustshare the same secret key, established by some out-of-band mechanism, unlessyou have a use case where the plain text is encrypted to self.
If you need public (asymmetric) key encryption, check out the available RSA andECDH algorithms for JWE.
Direct encryption works with any of the six standard available contentencryption algorithms (set by the 'enc' JWE header parameter). These aregrouped into two classes authenticated encryption withAES/CBC/HMAC/SHA andauthenticated encryption with AES/GCM.
The AES key length must match the expected for the selected JWE encryption. Ifthat condition isn't met the library will throw a JOSE exception whenencryption is attempted.
Content encryption class
JWE enc identifier
Key bitlength
AES/CBC/HMAC/SHA
A128CBC-HS256
256
A192CBC-HS384
384
A256CBC-HS512
512
A128CBC+HS256 (deprecated)
256
A256CBC+HS512 (deprecated)
512
AES/GCM
A128GCM
128
A192GCM
192
A256GCM
256
The required AES key length for a particular JWE encryption method can also beobtained programmatically:
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Example direct encryption with AES GCM using a symmetric 128 bit key:
Random Shared Key Generator Hs256 Generator
Important!
Wpa Pre Shared Key
Don't forget to refer to the security considerations on key lifetimes insection 8.2 and AES GCM insection 8.4 of the JSON WebAlgorithm (JWA) spec when using direct encryption.