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Admin Notes: Domino and Encryption

I often find myself running for this information, and I'm going to keep it here.   That way, it may benefit someone else as well.
Lotus Domino Server/User ID

- RSA dual-key Cryptosystem and RC2, RC4 and AES algorithms for encryption

- RSA keys can be at any of the following strengths:

    - 630 bit (Domino R6+)

    - 1024 bit (Domino R7+)

    - 2048 bit (Domino R8+)

- RC4 algorithm key

    - 128bit (Domino R6+)

- RC2 algorithm key

    - 128bit (Domino R6+)

- AES algorithm key

    - 128bit (Domino R8.0.1+) (Required for FIPS)

    - 256bit (Domino R8.0.1+) (Required for FIPS) 

Lotus Network Encryption

- RC4 key

    - 128bit (Domino R6+)

Local Database Encryption

- RC2

    - 128bit (Domino 6+)


    - 128bit (Domino 8.0.1+ based on UserID/ServerID encryption level)  (Required for FIPS)

    - 256bit (Domino 8.0.1+ based on UserID/ServerID encryption level)  (Required for FIPS)

Internet User

- X.509 certificate

SSL Encryption

SSLv3 Cipher Settings

    - AES encryption with 128bit key and SHA-1 MAC

    - AES encryption with 256bit key and SHA-1 MAC

    - RC4 encryption with 128bit key and MD5 MAC

    - RC4 encryption with 128bit key and SHA-1 MAC

    - Triple DES encryption with 168bit key and SHA-1 MAC

    - DES encryption with 56bit key and SHA-1 MAC

    - RC4 encryption with 40bit key and MD5 MAC

(MAC is Message Authentication Code, which ensures that a message has not been tampered with.)


Domino 8.0.1 and up support the Federal Information Processing Standard (FIPS) by using a FIPS 140-2 certified cryptographic library.  This certification applies only for Domino encryption, not for SSL encryption.   FIPS certified SSL requires that a proxy server that meets the FIPS standard be placed in front of the Domino server.



  1. Thanks, it may be useful to note which keys and algorithms are used for the generation of the random encryption key that encryptes a field or message body and the public/private key that is used to encrypt/decrypt the random key so that the message can in turn be decrypted. I find that many times the help text implies that the 2048Bit key pairs are used to encrypt a message, and you have to dig further. At least it explains why there are 2048 bit and 128/256bit keys.

  2. Thanx, very useful info!


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