Java encrypt decrypt string example

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Accept all cookies Customize settings. Generate the key pair using this method as shown below. You can get the public key from the generated KeyPair object using the getPublic method as shown below. The getInstance method of Cipher class accepts a String variable representing the required transformation and returns a Cipher object that implements the given transformation.

The update method of the Cipher class accepts a byte array representing the data to be encrypted and updates the current object with the data given. Update the initialized Cipher object by passing the data to the update method in the form of byte array as shown below. The doFinal method of the Cipher class completes the encryption operation. Therefore, finish the encryption using this method as shown below. Following Java program accepts text from user, encrypts it using RSA algorithm and, prints the encrypted format of the given text.

Malhar Lathkar. Anadi Sharma. Connect and share knowledge within a single location that is structured and easy to search. I am new to cryptography. I wish to learn how to encrypt and decrypt the text in a file I had a doubt that whether the encrypted text will be same for single text when encryption is done multiple times on the same text? Can anyone please clear my doubt? I had a doubt that whether the encrypted text will be same for single text when encryption done by multiple times on a same text??

Whether encrypted be the same when plain text is encrypted with the same key depends of algorithm and protocol. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

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