java rsa encryption with public key

rsa (rivest-shamir-adleman) is a widely used public key cryptographic system that enables secure data transmission. in rsa, a pair of keys is generated: a public key for encryption and a private key for decryption. here's a tutorial on how to implement rsa encryption in java.

### prerequisites

2. **ide**: you can use any ide like intellij idea, eclipse, or even a simple text editor to write your java code.

### key generation

rsa uses two keys:
- **public key**: used for encryption.
- **private key**: used for decryption.

### steps to implement rsa encryption in java

1. **generate rsa key pair**: use `keypairgenerator` to generate a public-private key pair.
2. **encrypt data**: use the public key to encrypt the data.
3. **decrypt data**: use the private key to decrypt the data.

### code example

here’s a complete example demonstrating rsa encryption and decryption in java.

### explanation of the code

1. **key generation**:

2. **encryption**:

3. **decryption**:
- similar to encryption, but initializes the cipher for decryption using the private key.

### running the code

- run the compiled code using `java rsaexample`.

### important notes

- rsa is typically used to en ...

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