jodd-core/src/main/java/jodd/crypt/Threefish.java
@Override
	public byte[] encryptBlock(final byte[] content, final int offset) {
		
		long[] contentBlock = bytesToLongs(content, offset, blockSizeInBytes);
		
		long[] encryptedBlock = new long[blockSize / Long.SIZE];

		blockEncrypt(contentBlock, encryptedBlock);

		return longsToBytes(encryptedBlock);
	}
@Override
	public byte[] encryptBlock(final byte[] content, final int offset) {
		
		long[] contentBlock = bytesToLongs(content, offset, blockSizeInBytes);
		
		long[] encryptedBlock = new long[blockSize / Long.SIZE];

		blockEncrypt(contentBlock, encryptedBlock);

		return longsToBytes(encryptedBlock);
	}
Encrypts a block.