From aeb714c5fb12e66a7e5e59150d38d8f083e7ebd4 Mon Sep 17 00:00:00 2001 From: Alex Gaynor Date: Mon, 9 Sep 2013 18:06:14 -0700 Subject: Iinital work on 3DES. No tests and no implementation yet. --- docs/primitives/symmetric-encryption.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'docs') diff --git a/docs/primitives/symmetric-encryption.rst b/docs/primitives/symmetric-encryption.rst index 1b8d1d73..91f3b7aa 100644 --- a/docs/primitives/symmetric-encryption.rst +++ b/docs/primitives/symmetric-encryption.rst @@ -52,6 +52,25 @@ Ciphers This must be kept secret. +Insecure Ciphers +---------------- + +.. class:: cryptography.primitives.block.ciphers.TripleDES(key) + + Triple DES (Data encryption standard), sometimes refered to as 3DES, is a + block cipher standardized by NIST. Triple DES should be considered to be + cryptographically broken and should not be used for new applications, old + applications should strongly consider moving away from it. + + :param bytes key: The secret key, either ``64``, ``128``, or ``192`` bits + (note that DES functionally uses ``56``, ``112``, or + ``168`` bits of the key, there is a parity byte in each + component of the key), in some materials these are + referred to as being up to three separate keys (each + ``56`` bits long), they can simply be concatenated to + produce the full key. This must be kept secret. + + Modes ~~~~~ -- cgit v1.2.3