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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/primitives/symmetric-encryption.rst | 19 |
1 files changed, 19 insertions, 0 deletions
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 ~~~~~ |