# AUTHOR <EMAIL@ADDRESS>, YEAR.
# 
# Translators:
msgid ""
msgstr ""
"Project-Id-Version: Defensive Coding Guide\n"
"POT-Creation-Date: 2013-03-12T03:19:44\n"
"PO-Revision-Date: 2013-03-19 15:29+0000\n"
"Last-Translator: Automatically generated\n"
"Language-Team: Chinese (China) <trans-zh_cn@lists.fedoraproject.org>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Language: zh_CN\n"
"Plural-Forms: nplurals=1; plural=0;\n"

#. Tag: title
#, no-c-format
msgid "Cryptography"
msgstr ""

#. Tag: title
#, no-c-format
msgid "Primitives"
msgstr ""

#. Tag: para
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msgid "Chosing from the following cryptographic primitives is recommended:"
msgstr ""

#. Tag: para
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msgid "RSA with 2048 bit keys and OAEP"
msgstr ""

#. Tag: para
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msgid "AES-128 in CBC mode"
msgstr ""

#. Tag: para
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msgid "SHA-256"
msgstr ""

#. Tag: para
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msgid "HMAC-SHA-256"
msgstr ""

#. Tag: para
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msgid "HMAC-SHA-1"
msgstr ""

#. Tag: para
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msgid ""
"Other cryptographic algorithms can be used if they are required for "
"interoperability with existing software:"
msgstr ""

#. Tag: para
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msgid "RSA with key sizes larger than 1024 and legacy padding"
msgstr ""

#. Tag: para
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msgid "AES-192"
msgstr ""

#. Tag: para
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msgid "AES-256"
msgstr ""

#. Tag: para
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msgid "3DES (triple DES, with two or three 56 bit keys)"
msgstr ""

#. Tag: para
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msgid "RC4 (but very, very strongly discouraged)"
msgstr ""

#. Tag: para
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msgid "SHA-1"
msgstr ""

#. Tag: para
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msgid "HMAC-MD5"
msgstr ""

#. Tag: title
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msgid "Important"
msgstr ""

#. Tag: para
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msgid ""
"These primitives are difficult to use in a secure way. Custom implementation"
" of security protocols should be avoided. For protecting confidentiality and"
" integrity of network transmissions, TLS should be used (<xref linkend"
"=\"chap-Defensive_Coding-TLS\" />)."
msgstr ""

#. Tag: title
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msgid "Randomness"
msgstr ""

#. Tag: para
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msgid ""
"The following facilities can be used to generate unpredictable and non-"
"repeating values. When these functions are used without special safeguards, "
"each individual rnadom value should be at least 12 bytes long."
msgstr ""

#. Tag: para
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msgid ""
"<function>PK11_GenerateRandom</function> in the NSS library (usable for high"
" data rates)"
msgstr ""

#. Tag: para
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msgid ""
"<function>RAND_bytes</function> in the OpenSSL library (usable for high data"
" rates)"
msgstr ""

#. Tag: para
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msgid ""
"<function>gnutls_rnd</function> in GNUTLS, with "
"<literal>GNUTLS_RND_RANDOM</literal> as the first argument (usable for high "
"data rates)"
msgstr ""

#. Tag: para
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msgid ""
"<type>java.security.SecureRandom</type> in Java (usable for high data rates)"
msgstr ""

#. Tag: para
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msgid "<function>os.urandom</function> in Python"
msgstr ""

#. Tag: para
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msgid "Reading from the <filename>/dev/urandom</filename> character device"
msgstr ""

#. Tag: para
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msgid ""
"All these functions should be non-blocking, and they should not wait until "
"physical randomness becomes available. (Some cryptography providers for Java"
" can cause <type>java.security.SecureRandom</type> to block, however.) Those"
" functions which do not obtain all bits directly from "
"<filename>/dev/urandom</filename> are suitable for high data rates because "
"they do not deplete the system-wide entropy pool."
msgstr ""

#. Tag: title
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msgid "Difficult to use API"
msgstr ""

#. Tag: para
#, no-c-format
msgid ""
"Both <function>RAND_bytes</function> and "
"<function>PK11_GenerateRandom</function> have three-state return values "
"(with conflicting meanings). Careful error checking is required. Please "
"review the documentation when using these functions."
msgstr ""

#. Tag: para
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msgid "Other sources of randomness should be considered predictable."
msgstr ""

#. Tag: para
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msgid ""
"Generating randomness for cryptographic keys in long-term use may need "
"different steps and is best left to cryptographic libraries."
msgstr ""
