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SAS/SHARE User's Guide |

The encryption algorithms as well as the SAS Proprietary algorithm are defined as follows:

- RC2
- A proprietary algorithm developed by RSA Data Security, Inc., RC2 is an alternative to DES. The algorithm expands a single message by up to 8 bytes. RC2 is a block cipher that encrypts data in blocks of 64 bits. The size of the output of the algorithm is always a multiple of the block size. The RC2 key size can range from 8 to 256 bits.
- RC4
- A proprietary algorithm developed by RSA
Data Security, Inc., RC4 is a stream cipher. A stream cipher encrypts one
byte at a time. The RC4 key size can range from 8 to 2048 bits.
**Note:**The term**cipher**means encryption algorithm. - DES
- An acronym for Data Encryption Standard, DES was developed by IBM. The algorithm expands a single message by up to 8 bytes. DES is a block cipher that encrypts data in blocks of 64 bits by using a 56-bit key.
- Triple DES
- Triple DES executes DES three times on the data in order to exploit a key size that is three times that of DES. The algorithm expands a single message by up to 8 bytes. DES is a block cipher that encrypts data in blocks of 64 bits.
- SAS Proprietary
- This provides basic encryption services on all platforms and requires no additional product licenses. The algorithm expands a single message by approximately one-third. It uses a 32-bit key.

The key sizes that are used are based on the encryption software that is available on your host and the value that is assigned to the NETENCRKEYLEN option (see the next section).

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Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.