| 1 | 00 padding |
| Message padding used for block cipher algorithms. Binary 0 are padded to fill a message upto a block length. The block length is implicit specified through the algorithm and mode of operation. |
| 2 | PKCS #1 padding |
| Message padding used for block cipher algorithms according to PKCS #1 (published by RSA Inc., 1993). |
| 3 | ISO 10126 padding |
| Message padding used for block cipher algorithms according to ISO-10126 specification. |
| 4 | TBSS padding |
| Message padding used for block cipher algorithms according to TBSS (Swiss standard, published by Telekurs AG, 1996). |
| 5 | FF padding |
| Message padding used for block cipher algorithms. Binary 255 are padded to fill a message upto a block length. The block length is implicit specified through the algorithm and mode of operation. |
| 6 | ISO 9796 #1 padding |
| Message padding for digital signature schemes according to ISO 9796 part 1. |
| 7 | ISO 9796 #2 padding |
| Message padding for digital signature schemes according to ISO 9796 part 2. |
| 8 | ISO 9796 #3 padding |
| Message padding for digital signature schemes according to ISO 9796 part 3. |
| 9 | TBSS envelope padding |
| Message padding for digital envelopes according to TBSS (Swiss standard, published by Telekurs AG, 1996) |
| 10 | PKCS #1 envelope padding |
| Message padding for digital envelopes according to PKCS #1 (published by RSA Inc, 1993). |
| 11 | PKCS #1 signature padding |
| Message padding for digital signature schemes according to PKCS #1 (published by RSA Inc, 1993). |
| 12 | BCS signature padding |
| Message padding for digital signature schemes according to ZKA (German standard published by ZKA 1995). |
| 13 | OAEP |
| Optimal Asymmetric Encryption Padding (published in IEEE P1363). |
