后量子密码学工具。
Codecrypt 目前不再维护,不过我至今仍在使用它。如果你有兴趣开发/维护它,请联系我。
这是一个类似 GnuPG 的 Unix 程序,用于加密和签名,仅使用抗量子计算机的算法:
Codecrypt 是自由软件。代码以 LGPL3 条款授权,希望这能使其更容易与其他工具组合使用。
apt-get install codecrypt语言封装:
软件包附带了一份完整的 UNIX 风格手册页。你可以在此在线查看:http://e-x-a.org/codecrypt/ccr.1.html
为实现既定目标,codecrypt 使用了大量(传统但“量子安全”的)密码学原语。原语的选择基于设计的易审计性、简洁性以及所提供的安全性。
codecrypt 的 git 仓库中包含 doc/papers,里面有一堆未分类的、关于相关主题的学术论文和幻灯片。
使用的流密码:
doc/nums 目录中有说明。使用的 CRHF:
签名算法:
加密算法:
注意事项:
密码学不适用于“在线”使用,因为某些算法(尤其是 MDPC 解码)(稍微)容易受到时序攻击。
一切的设计理念是使其工作方式大致类似于 GnuPG,但留有良好的简洁性余量。让我们用随机数据来玩玩!
ccr -g help
ccr -g sig --name "John Doe" # your signature key
ccr -g enc --name "John Doe" # your encryption key
ccr -K #watch the generated keys
ccr -k
ccr -p -a -o my_pubkeys.asc -F Doe # export your pubkeys for friends
#(now you should exchange the pubkeys with friends)
#see what people sent us, possibly check the fingerprints
ccr -inaf < friends_pubkeys.asc
#import Frank's key and rename it
ccr -ia -R friends_pubkeys.asc --name "Friendly Frank"
#send a nice message to Frank (you can also specify him by @12345 keyid)
ccr -se -r Frank < Document.doc > Message_to_frank.ccr
#receive a reply
ccr -dv -o Decrypted_verified_reply.doc <Reply_from_frank.ccr
#rename other's keys
ccr -m Frank -N "Unfriendly Frank"
#and delete pukeys of everyone who's Unfriendly
ccr -x Unfri
#create hashfile from a large file
ccr -sS hashfile.ccr < big_data.iso
#verify the hashfile
ccr -vS hashfile.ccr < the_same_big_data.iso
#create (ascii-armored) symmetric key and encrypt a large file
ccr -g sha256,chacha20 -aS symkey.asc
ccr -eaS symkey.asc -R big_data.iso -o big_data_encrypted.iso
#decrypt a large file
ccr -daS symkey.asc <big_data_encrypted.iso >big_data.iso
#password-protect all your private keys
ccr -L
#protect a symmetric key using another symmetric key
ccr -L -S symkey1 -w symkey2
#password-protect symkey2 with a custom cipher
ccr -L -S symkey2 -w @xsynd,cube512
为完整起见,我在此列出所有选项(也可通过 ccr --help 获取)
Usage: ./ccr [options]
Common options:
-h, --help display this help
-V, --version display version information
-T, --test perform (probably nonexistent) testing/debugging stuff
Global options:
-R, --in set input file, default is stdin
-o, --out set output file, default is stdout
-E, --err the same for stderr
-a, --armor use ascii-armored I/O
-y, --yes assume that answer is `yes' everytime
Actions:
-s, --sign sign a message
-v, --verify verify a signed message
-e, --encrypt encrypt a message
-d, --decrypt decrypt an encrypted message
Action options:
-r, --recipient encrypt for given user
-u, --user use specified secret key
-C, --clearsign work with cleartext signatures
-b, --detach-sign specify file with detached signature
-S, --symmetric enable symmetric mode of operation where encryption
is done using symmetric cipher and signatures are
hashes, and specify a filename of symmetric key or hashes
Key management:
-g, --gen-key generate keys for specified algorithm
-g help list available cryptographic algorithms
-k, --list list the contents of keyring
-K, --list-secret
-i, --import import keys
-I, --import-secret
-p, --export export keys
-P, --export-secret
-x, --delete delete matching keys
-X, --delete-secret
-m, --rename rename matching keys
-M, --rename-secret
-L, --lock lock secrets
-U, --unlock unlock secrets
Key management options:
-F, --filter only work with keys with matching names
-f, --fingerprint format full key IDs nicely for human eyes
-N, --name specify a new name for renaming or importing
-n, --no-action on import, only show what would be imported
-w, --with-lock specify the symmetric key for (un)locking the secrets
-w @SPEC ask for password and expand it to a symmetric key
of type SPEC for (un)locking the secret
Codecrypt 会吃掉数据。请谨慎使用。阅读 F 手册。
作者是自学成才的密码学家。