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Diffstat (limited to 'spec/tor-spec/preliminaries.md')
| -rw-r--r-- | spec/tor-spec/preliminaries.md | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/spec/tor-spec/preliminaries.md b/spec/tor-spec/preliminaries.md index 5cb0410..c97e774 100644 --- a/spec/tor-spec/preliminaries.md +++ b/spec/tor-spec/preliminaries.md @@ -1,4 +1,5 @@ <a id="tor-spec.txt-0"></a> + # Preliminaries ```text @@ -9,6 +10,7 @@ ``` <a id="tor-spec.txt-0.1"></a> + ## Notation and encoding ```text @@ -31,6 +33,7 @@ We use "byte" and "octet" interchangeably. Possibly we shouldn't. Some specs mention "base32". This means RFC4648, without "=" padding. <a id="tor-spec.txt-0.1.1"></a> + ### Encoding integers Unless we explicitly say otherwise below, all numeric values in the @@ -39,6 +42,7 @@ integer" means a big-endian 32-bit integer; a "2-byte" integer means a big-endian 16-bit integer, and so forth. <a id="tor-spec.txt-0.2"></a> + ## Security parameters Tor uses a stream cipher, a public-key cipher, the Diffie-Hellman @@ -67,6 +71,7 @@ KEY_LEN -- the length of the stream cipher's key, in bytes. ``` <a id="tor-spec.txt-0.3"></a> + ## Ciphers These are the ciphers we use _unless otherwise specified_. Several of @@ -122,7 +127,8 @@ strong pseudorandom number generator seeded from a strong entropy source, unless otherwise noted. <a id="tor-spec.txt-0.4"></a> -## A bad hybrid encryption algorithm, for legacy purposes. + +## A bad hybrid encryption algorithm, for legacy purposes Some specifications will refer to the "legacy hybrid encryption" of a byte sequence M with a public key KP. It is computed as follows: @@ -143,4 +149,3 @@ allows attackers to modify the bytes not covered by the OAEP -- see Goldberg's PET2006 paper for details. Do not use it as the basis for new protocols! Also note that as used in Tor's protocols, case 1 never occurs. - |