.-ENCR--=--0-----. >>-+----------------+------------------------------------------>< '-ENCR--=--crypt-'
| macroinstructions: | MODEENT |
| dependencies: | VTAM® data encryption facility only |
Specifies what type of cryptography the logical unit expects.
Note: ENCR can be specified only for the VTAM data encryption facility.
Any hexadecimal number in the range 0–F (or an equivalent decimal value) can be specified. One or two digit hexadecimal strings can also be used. A 4-bit binary string (for example, ENCR=B'0001') can also be specified.
The ENCR value is converted to a 4-bit string, which is
treated as two 2-bit fields. The meanings of the bit settings are
as follows:
- xx..
- Private cryptography field
- 00..
- No private cryptography
- 01..
- Private cryptography used
- ..xx
- VTAM cryptography field
- ..00
- No session-level cryptography
- ..01
- Selective cryptography; the primary logical unit can encipher messages and the secondary logical unit must support cryptography.
- ..10
- Reserved
- ..11
- Mandatory cryptography; all messages on this session will be enciphered and deciphered.
This value is stored in the first four bits of byte 26 in the session parameter field.
Note: The VTAM data
encryption facility can use the following cryptography facilities:
- Integrated Cryptographic Service Facility (ICSF/MVS)
- IBM® Programmed Cryptographic Facility program product (PCF)
- IBM Cryptographic Unit Support program product (CUSP)
- Translation Security System product (TSS)