title: RSA signature size?
body: <p>I would like to know what is the length of RSA signature ? Is it always the same size as the RSA key size like if the key size is 1024 then RSA signature is 128 bytes , if the key size is 512 bits then RSA signature is 64 bytes ? what is RSA modulus ?
  Also what does RSA-sha1 mean ?
  Any pointers greatly appreciated.</p>