**Connected: An Internet Encyclopedia**

*6.3.1. The NULL Encryption System (null)*

**Up:**
Connected: An Internet Encyclopedia

**Up:**
Requests For Comments

**Up:**
RFC 1510

**Up:**
6. Encryption and Checksum Specifications

**Up:**
6.3. Encryption Systems

**Prev:** 6.3. Encryption Systems

**Next:** 6.3.2. DES in CBC mode with a CRC-32 checksum (des-cbc-crc)

### 6.3.1. The NULL Encryption System (null)

6.3.1. The NULL Encryption System (null)
If no encryption is in use, the encryption system is said to be the
NULL encryption system. In the NULL encryption system there is no
checksum, confounder or padding. The ciphertext is simply the
plaintext. The NULL Key is used by the null encryption system and is
zero octets in length, with keytype zero (0).

**Next:** 6.3.2. DES in CBC mode with a CRC-32 checksum (des-cbc-crc)

**Connected: An Internet Encyclopedia**

*6.3.1. The NULL Encryption System (null)*