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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.

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    $\begingroup$ 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. $\endgroup$
    – Ilmari Karonen
    Jun 14, 2016 at 23:39
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    $\begingroup$ Although I don't know the background of the legacy code, I think you could well be assuming too much. $\endgroup$
    – Maarten Bodewes ♦
    Jun 15, 2016 at 9:44

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