code: @Deprecated
  	public static String hash(String plaintext) throws WrappedException {
  		try {
  			MessageDigest md = MessageDigest.getInstance("SHA-1");
  			md.update(plaintext.getBytes("UTF-8"));
  			return hexEncode(md.digest());
  		} catch(NoSuchAlgorithmException | UnsupportedEncodingException e) {
  			throw new WrappedException(e);
  		}
  	}
docs: Performs a one-way hash of the plaintext value using SHA-1.
  
  @exception  WrappedException  if any problem occurs.
  
  @deprecated  Use salted algorithm, update database of stored passwords as passwords are validated
  
  @see  HashedPassword for proper password hashing
  @see  HashedKey for SHA-256 hashing