# Encrypt letters separately?

I am trying to encrypt the word Hello using RSA. When encrypting Hello’s integer representation, is each letter encrypted separately, or is the whole thing encrypted? Furthermore, am I correct in assuming that Hello is to be represented in binary form for RSA encryption?

• In practice: neither. 'Hello' is not encrypted with RSA at all, but with a symmetric cipher, the key of which is then RSA encrypted. – otus Nov 2 '15 at 8:14

I think I found the answer to my own question... First Hello is represented in binary form (ASCII). After that, the integer in binary form is converted to decimal form.
• 'Hello'.encode('hex') = '48656c6c6f'  and so int('48656c6c6f', 16)=310939249775 – Lisbeth Jan 9 '16 at 10:41