# Name of an archaic type of RSA padding (0BBBBBBB…)

In some legacy code, I encountered RSA signature padding in the following format (hexadecimal):

0B BB BB BB BB BB BB ... BB BB <hash>

Is there a name for this simple type of RSA padding? I would think that the original developers got this design from something.

• This looks vaguely similar to ANSI X9.31 padding, except that the first byte in X9.31 padding is 6B instead of 0B, and the last one is BA. – Ilmari Karonen Jun 14 '16 at 23:39
• Although I don't know the background of the legacy code, I think you could well be assuming too much. – Maarten Bodewes Jun 15 '16 at 9:44