command line interface for AES encryption: openssl aes-256-cbc -salt -in filename -out filename.enc Python has support for AES in the shape of the PyCrypto package, but it only provides the tools. openssl enc -aes-256-cbc -salt -in file.txt -out file.enc # alternatywna forma tego samego, z kodowaniem tekstowym base64 openssl aes-256-cbc -a -salt -in file.txt -out file.ascii # deszyfruj plik binarny na stdout openssl enc -d -aes-256-cbc -in file.enc … Thank you for reading this article. don't use a salt in the key derivation routines. encrypt command: # echo -n test123 | openssl enc -aes-128-cbc -pass pass:"pass123" -a -md md5 decrypt command: OpenSSL uses this password This key will be used for symmetric encryption. Encryption & Decryption salt in PHP with OpenSSL. command line interface for AES encryption: openssl aes-256-cbc -salt -in filename -out filename.enc Python has support for AES in the shape of the PyCrypto package, but it only provides the tools. back upon authentication failure. openssl enc -aes-256-cbc -salt -in myLargeFile.xml \ -out myLargeFile.xml.enc -pass file:./key.bin 대칭 키를 암호화하여 안전하게 다른 사람에게 보낼 수 있습니다. [-bufsize number] Documentation for using the openssl application is somewhat scattered, however, … The enc program only supports a the password to derive the key from. Introduction. openssl enc -ciphername [-in filename] ... openssl des3 -salt -in file.txt -out file.des3 Decrypt a file using a supplied password: openssl des3 -d -salt -in file.des3 -out file.txt -k mypassword Encrypt a file then base64 encode it (so it can be sent via mail for example) using Blowfish in CBC mode: To then decrypt myfile.enc, run: openssl enc -d -aes-256-cbc -in myfile.enc … openssl rsautl -encrypt -inkey public.key -pubin -in key.bin -out key.bin.enc shred -u key.bin Blowfish and RC5 algorithms use a 128 bit key. encrypting, this is the default. ¸ëŸ¬ë‚˜ 안전하지 않은 - 아래 참조) 명령 행 인터페이스를 제공합니다. This allows a rudimentary integrity or password check to 참고: 복호화의 반복은 암호화의 반복과 동일해야합니다. [root@localhost ~]# echo "hello,world" | openssl enc -aes128 -e -a -salt enter aes-128-cbc encryption password: Verifying - enter aes-128-cbc encryption password: U2FsdGVkX1/LT+Ri9pzjjS0FIGXJLNRc8ljvZJ3hf0M= 加解密文件 Thanks to the OpenSSL development team for producing such a handy tool. openssl enc -aes-256-cbc -salt -in filename.txt -out filename.enc Decrypt a file openssl enc -d -aes-256-cbc -in filename.enc Check Using OpenSSL. The basic command to use is openssl enc plus some options:-P — Print out the salt, key and IV used, then exit-k or -pass pass: — to specify the password to use-aes-256-cbc — the cipher name PTC MKS Toolkit for Enterprise Developers 64-Bit Edition. [-kfile filename] When the enc command lists supported ciphers, ciphers provided by engines, Unfortunately twofish is not yet available in the list of openssl ciphers. Files have an 8-byte signature, followed by an 8(? $ openssl enc -aes-256-cbc -in plaintext.txt -base64 -md sha1. used except for test purposes or compatibility with ancient versions of OpenSSL Inpatient rehabilitation, home health & hospice Through our national network of inpatient rehabilitation hospitals and home health and hospice agencies, Encompass Health is there to meet you where you are on your post-acute care journey. Openssl aes-256-cbc iv. The AEAD modes currently in common Using Public and Private keys. ones provided by configured engines. Following the salt is the encrypted data. The salt and password are to be combined in a particular way, to derive the encryption key and initialization vector. openssl enc -ciphername [-in filename] [-out filename] [-pass arg] [-e] [-d] [-a/-base64] [-A][-k password] [-kfile filename] [-K key] [-iv IV ] [-S salt] [-salt] [-nosalt] [-z][-md] [-p] [-P] [-bufsize number] [-nopad] [-debug] [-none] [-engine id] openssl aes-256-cbc -a -salt -in secrets.txt -out secrets.txt.enc How does this work? How to use Python/PyCrypto to decrypt files that have been encrypted using … The OpenSSL command line tool is installed as part of Ubuntu (and most other distributions) by default, you can see which ciphers are available for use via the command line use by running: We'll show examples using AES, Triple DES, and Blowfish. [-salt] These key/iv/nonce [-out filename] However openssl only stores some 'file magic' (EG "Salted__" at the start of the file), and the random "salt" that was used, with the encrypted file. In case that you needed to use OpenSSL to encrypt an entire directory you would, firs,t need to create gzip tarball and then encrypt the tarball with the above method or you can … Encrypt the symmetric key so you can safely send it to the other person. To encrypt a file called myfile.txt using Triple DES in CBC mode, run: This will prompt you for a password, then create the encrypted file myfile.enc (Again: use a strong password and don't forget it, as you'll need it for the decryption stage!). [-md digest] You can obtain an incomplete help message by using an invalid option, eg. for this is that without the salt the same password always generates the same 이 명령어를 이용하면 중간에 비밀번호를 묻게되는 데, 이 때, 비밀번호를 입력하면 암호화가 된 파일이 생성되게 된다. This is because a different (random) salt is used. All the block ciphers normally use PKCS#5 padding, also known as standard To encrypt a file called myfile.txt using AES in CBC mode, run: This will prompt you for a password, then create the encrypted file myfile.enc (NB: use a strong password and don't forget it, as you'll need it for the decryption stage!). Note that if you omit the "-out myfile.txt" part, the decrypted contents of your file get sent to standard output (so if your doing this on the command line, you'll see it displayed in front of you). if encrypt data by openssl enc command with pass and salt, it can aslo decrypt by openssl_decrypt. openssl rsautl -encrypt -inkey public.pem -pubin -in key.bin -out key.bin.enc nim4n136 / encryption_openssl_salt.php. fixed number of algorithms with certain parameters. generator. from a password unless you want compatibility with previous versions of When the salt is being used the first eight bytes of the Superseded by the -pass argument. Use the list command to get a list of supported ciphers.. How so? Decrypt the above string using openssl … The OpenSSL command line tool is installed as part of Ubuntu (and most other distributions) by default, you can see which ciphers are available for use via the command line use by running: We'll show examples using AES, Triple DES, and Blowfish. The basic usage is to specify a ciphername and various options describing the actual task. Files have an 8-byte signature, followed by an 8(? modes or other modes, cms is recommended, as it provides a OpenSSL. openssl enc If decryption is set then openssl enc -aes-256-cbc -salt -in foo.txt -out foo.txt.enc -pass file:./key.bin Encrypt the symmetric key so you can safely send it to the other person and destroy the un-encrypted symmetric key so nobody finds it. [-nopad] Convert a base 64 encoded certificate (also referred to as PEM or RFC 1421) to binary DER format. (The enc(1) program assumes you know what you're doing, and will overwrite your encrypted archive without a second thought if that's what you tell it to do.) [-z] PTC MKS Toolkit for Professional Developers 64-Bit Edition For example, I have a file named “hash.txt” and I am going to encrypt this. openssl enc -e -aes-256-cbc -in plain.txt -out encrypted.data. Enc, This is a significant weakening, please use more strong keys in real life. Format . If you're new to encryption or simply want to encrypt a file but don't want to bother setting up a public/private key pair (required by some tools), then these simple examples of using OpenSSL could be what your looking for. [-S salt] key given with the -K option will be used and the IV generated from the generate a 256 bit random keyand OpenSSL will use it to perform a symmetric encryption. youforgot a part of your password but still remember most of it).Finding the password of the file without knowing anything about it wouldtake way too much time (unless the password is really … The program tries to decrypt the file by trying all the possible passwords.It is especially useful if you know something about the password (i.e. Superseded by openssl enc -aes-256-cbc -pass pass:kekayan -p -in image.png -out file.enc So now you can see the image is encrypted and the salt ,key and iv values. standard data format and performs the needed key/iv/nonce management. entire burden of key/iv/nonce management upon the user, the risk of Without the -salt option it is possible to perform efficient dictionary attacks on the password and to … The same story refer to -iv , but openssl aes-256-cbc -e -nosalt -a -in input.txt -out output.txt -k key -iv ivkey about input.txt : I have created this file on my Desktop and wrote the plaintext in it. The following command will prompt you for a password, encrypt a file called plaintext.txt and … There should be an option to allow an iteration count to be included. The enc interface by necessity must begin streaming output (e.g., I tend to set most options actively, e.g: openssl enc -e -a -aes-256-cbc -salt -in plain.txt -out plain.aes256 -pass pass:7231 openssl enc -d -a -aes-256-cbc -salt -in plain.aes256 -pass pass:7231 The mode (the algorithms mode of operation) we chose to use above was CBC (cipher block chaining) mode. For the sake of example, we can demonstrate how OpenSSL manages public keys using the RSA algorithm. To encrypt a plaintext using AES with OpenSSL, the enc command is used. Only a single iteration is performed. the input filename, standard input by default. functionality cannot be removed with a stable release branch. or decryption. Decrypt a Blowfish-encrypted file. -help. The first step is … of hex digits. if the -a option is set then base64 process the data on one line. Refer to the list of ciphers to see exactly what is available, but bear in mind that CBC mode is considered to be better. engine-provided ciphers, because this form is processed before the ... $ openssl aes-128-cbc -in secret.txt -out secret.txt.enc To decrypt: $ openssl aes-128-cbc -d -in secret.txt.enc … OpenSSL uses a hash of the password and a random 64bit salt. Multiple files can be specified separated by an OS-dependent character. Use NULL cipher (no encryption or decryption of input). block padding. It leaves it up to you to remember everything else! Simply put, a cipher is a particular algorithm used to encrypt and decrypt data. Encrypt a file using AES-128 using a prompted password with a 76 bit key or RC4 with an 84 bit key you can't use this program. [-pass arg] The header format is rather simple: magic value (8 bytes): the bytes 53 61 6c 74 65 64 5f 5f salt value (8 bytes) To then decrypt myfile.enc, run: You'll be prompted to enter the password you used when encrypting the file. openssl aes-256-cbc -salt -in hash.txt -out hash.txt.enc Blowfish is still a good algorithm but its author (Bruce Schneier) recommends that you should use the "twofish" algorithm instead if available. You can use other algorithms of course, and the same principles will apply. PTC MKS Toolkit for System Administrators PTC MKS Toolkit for Enterprise Developers If only the key is specified, the IV must additionally specified This option exists only if OpenSSL with compiled with zlib That's because this time we are decrypting, so the header of foo_enc is read, and the salt retrieved. )-byte salt. [-debug] I recently discovered that OpenSSL has an enc sub-command. Vector maps cannot be loaded. either by itself or in addition to the encryption or decryption. [-rand file...] The default digest was changed from MD5 to SHA256 in OpenSSL 1.1.0. the password source. openssl enc -d -aes-256-cbc -pbkdf2 -iter 20000 -in hello.enc -out hello.out. openssl-enc, enc - symmetric cipher routines ... be used if the key is being derived from a password unless you want compatibility with previous versions of OpenSSL. a strong block cipher, such as AES, in CBC mode. # openssl enc -d -blowfish -in file.enc -out file.dec. If you want to use the same password for both encryption of plaintext and decryption of ciphertext, then you have to use a method that is known as symmetric-key algorithm. the input data is base64 decoded before being decrypted. exposing AEAD modes is too great to allow. Please use a device with Web GL support. openssl enc -aes-256-cbc -pass pass:MYPASSWORD -d -P -in foo_enc which will print the same salt, key and IV as above, every time. 을 뒤져보면 다음과 같이 암호화와 복호화를 할 수 있다. eg. and SSLeay. openssl enc -aes-256-cbc -in texte -out encrypted_texte -k password has a salt in the first 16 bytes — with the bytes 8-15 being the salt itself. Superseded by the -pass argument. Part 2 - Public and private keys. [-in filename] be performed. All Rights Reserved. Without the -salt option it is possible to perform efficient dictionary attacks on the password and to attack stream cipher encrypted data. aes-256-cbc is the encryption cipher to be used. Simply put, a cipher is a particular algorithm used to encrypt and decrypt data. TL;DR. integrity upon reuse of key/iv/nonce, and since enc places the and PBKDF2 key derivation: Decrypt a file using a supplied password: Encrypt a file then base64 encode it (so it can be sent via mail for example) management issues also affect other modes currently exposed in enc, the actual key to use: this must be represented as a string comprised only The openssl command-line binary that ships with the OpenSSL libraries can perform a wide range of cryptographic operations. [-e] # openssl enc -aes-128-cbc -d -in file.encrypted -pass pass:123 Or even if he/she determinates that openssl_encrypt output was base64 and tries: # openssl enc -aes-128-cbc -d -in file.encrypted -base64 -pass pass:123 Or even if he determinates that base64 encoded file is represented in one line and tries: openssl aes-256-cbc -salt -a -d -in encrypted.txt -out plaintext.txt Asymmetric encryption. encrypting (this is the default). Encrypt and decrypt a string (With SALT Password - AES-128-cdc) - encrypt_decrypt_salt.sh It can come in handy in scripts or for accomplishing one-time command-line tasks. It does not make much sense to specify both key read the password to derive the key from the first line of filename. and password. The -salt option should ALWAYS be used if the key is being derived from a password unless you want compatibility with previous versions of OpenSSL. To decode the data both the encrypted random key and encrypted data will need to be sent. (I deleted my previous comment, wasn't really thought through) The openssl enc - style encryption is often used on embedded devices and as an ad-hoc encryption by programmers who just google "how to encrypt file with openssl" and copy the first result that comes up. However since the chance of random data passing the test You may then enter commands directly, exiting with either a quit command or by issuing a termination signal with either Ctrl+C or Ctrl+D. This can be used with a subsequent -rand flag. attacks on the password and to attack stream cipher encrypted data. PTC MKS Toolkit for Professional Developers IV must explicitly be defined. #openssl #security. Use the list command to get a list of supported ciphers. The following is a sa… in the configuration file. $ openssl prime # 도움말 $ openssl prime 997 # 997 이 소수인지 조사한다 $ openssl prime -hex ff0 # ff0 이 소수인지 조사한다 $ openssl prime -generate-bits 16 # 랜덤으로 16 비트 소수 생성 openssl aes-256-cbc -a -salt -in password.txt -out password.txt.enc mypass mypass I have to decrypt in java as I do here I do in UNIX. OpenSSL provides a popular (but insecure – see below!) Licensed under the OpenSSL license (the "License"). For bulk encryption of data, whether using authenticated encryption The -salt option should ALWAYS be used if the key is being derived [-d] like CCM and GCM, and will not support such modes in the future. The salt and password are to be combined in a particular way, to derive the encryption key and initialization vector. [-engine id]. configuration file is read and any ENGINEs loaded. Regarding AES, if you wish to use ECB mode with it instead, use -aes-256-ecb rather than -aes-256-cbc in the example. The Salt is written as part of the output, and we will read it back in the next section. use salt (randomly generated or provide with -S option) when So if, for example, you want to use RC2 this file except in compliance with the License. implications if not used correctly. A password will be prompted for to derive the key and IV if necessary. This is for compatibility with previous versions of OpenSSL. -ciphername The symmetric cipher commands allow data to be encrypted or decrypted Without the -salt option it is possible to perform efficient dictionary To then decrypt myfile.enc, run: You'll be prompted to enter the password you used when encrypting the file. # openssl enc -aes-256-cbc -d -in etc.tar.gz.dat | tar xz enter aes-256-cbc decryption password: The above method can be quite useful for automated encrypted backups. print out the key and IV used then immediately exit: don't do any encryption the -ciphers option (that is openssl enc -ciphers) produces a openssl enc -aes-256-cbc -salt -in myfile.txt -out myfile.enc, openssl enc -d -aes-256-cbc -in myfile.enc -out myfile.txt, openssl enc -des-ede3-cbc -salt -in myfile.txt -out myfile.enc, openssl enc -d -des-ede3-cbc -in myfile.enc -out myfile.txt, openssl enc -bf-cbc -salt -in myfile.txt -out myfile.enc, openssl enc -d -bf-cbc -in myfile.enc -out myfile.txt. options can only be used for hardware-assisted implementations of [-ciphers] Please share if you liked it. The separator is ; for MS-Windows, , for OpenVMS, and : for in the configuration file. No information about which encryption cipher was used is … see the PASS PHRASE ARGUMENTS section in openssl. 반복 횟수는 최소 10000이어야합니다. -S salt the actual salt to use: this must be represented as a … openssl is the command for the OpenSSL toolkit. For more information about the format of arg Skip to content. You may not use Here in the above example the output of echo command is pipelined with openssl command that pass the input to be encrypted using Encoding with Cipher (enc) that uses aes-256-cbc encryption algorithm and finally with salt it is encrypted using password (tecmint).. 5. openssl enc -aes128 -pbkdf2 -d -in file.aes128 -out file.txt \ -pass pass: Encrypt a file then base64 encode it (so it can be sent via mail for example) using AES-256 in CTR mode and PBKDF2 key derivation: openssl enc -aes-256-ctr -pbkdf2 -a -in file.txt -out file.aes256 In this section we will show how to encrypt and decrypt files using public and private keys. The general syntax for calling openssl is as follows: Alternatively, you can call openssl without arguments to enter the interactive mode prompt. -nosalt do not use a salt -salt use salt (randomly generated or provide with -S option) when encrypting (this is the default). one of the other options, the IV is generated from this password. when i was reading the latest source code of openssl, i found openssl enc has an 8-byte (64-bit) salt length; because the same (password, salt, … The reason NOTES. ciphers which are supported by the OpenSSL core or another engine specified Option SHOULD not be used except for test purposes or compatibility with openssl enc salt versions openssl. Using a secret password ( length is much shorter than the RSA.... Openssl libraries can perform a wide range of cryptographic operations principles will apply however since the chance random. There are modes other than CBC mode available for your encryption purposes, such as ECB with., notes, and: for all others provides a popular ( but insecure – see below! itself... Exists only if openssl with compiled with zlib or zlib-dynamic option an invalid option, the IV additionally. The example obtain an incomplete help message by using an invalid option, eg the symmetric key so you obtain. Allow an iteration count to be performed this section we will show how to use Python/PyCrypto to decrypt files have. Algorithms use a salt in PHP with openssl regarding AES, in CBC mode run... This password this key will be used for symmetric encryption the PASS arguments... Used except for test purposes or compatibility with ancient versions of openssl SSLeay... Is openssl enc salt openssl command-line binary that ships with the License - 아래 참조 ëª... Can demonstrate how openssl manages public keys using the generated key from the first line of filename OpenVMS and! Decrypt by openssl_decrypt program can be called either as openssl cipher or openssl enc, using the key! Run: AES and Triple DES are considered to be performed simply put, a cipher is significant. Data used to encrypt this ë ¥í•˜ë©´ 암호화가 된 파일이 생성되게 된다 to be performed handy... And IV if necessary decoding can also be performed either by itself in... > key.bin 대칭 키를 암호화하여 ì•ˆì „í•˜ê²Œ 다른 사람에게 보낼 수 있습니다 public keys openssl enc salt the generated from... Be called either as openssl cipher or openssl enc -aes-256-cbc -salt -in myLargeFile.xml \-out myLargeFile.xml.enc file! Share code, notes, and the salt retrieved number of algorithms with parameters! Level. and decription key.bin 대칭 키를 암호화하여 ì•ˆì „í•˜ê²Œ 다른 사람에게 보낼 수 있습니다 use -aes-256-ecb rather -aes-256-cbc... All the block ciphers normally use PKCS # 5 padding, also known as block... 256Bit AES is what the United States government uses to encrypt this file except in with... Certificate ( also referred to as PEM or RFC 1421 ) to DER! Mode, run: AES and Triple DES are considered to be combined in a particular way, to the. Except in compliance with the License exit: do n't do any or. Give me a java code to do some encryption and decription data using openssl enc -aes-256-cbc -salt -in \. Password check to be performed either by itself or in addition to the key. The PASS PHRASE arguments section in openssl leverage it to the specified upon! Is possible to perform efficient dictionary attacks on the password and to attack cipher. Encrypt the symmetric key so you can safely send it to perform efficient attacks. However, we can demonstrate how openssl manages public keys using the RSA key size ) to the... Put, a cipher is a particular way, to derive the encryption or after decryption encryption key and data! S assume that you set the password and to attack stream cipher encrypted data need. Mylargefile.Xml \-out myLargeFile.xml.enc -pass file:./key.bin 대칭 키를 암호화하여 ì•ˆì „í•˜ê²Œ 다른 사람에게 수. Wide range of cryptographic operations be strong usage is to specify both key and initialization.. Provides a popular ( but insecure – see below! use -aes-256-ecb than! Be defined and Triple DES are considered to be combined in a different output each time it run! Openssl License ( the `` License '' ), to derive the encryption key secret... All the block ciphers normally use PKCS # 5 padding, also as. Be an option to allow an iteration count to be included written as part of the person. Pem or RFC 1421 ) to derive the key is specified, the IV additionally... Data using openssl enc command lists supported ciphers, ciphers provided by engines, specified in the list command get... Configuration files are listed too explicitly be defined -salt -a -d -in encrypted.txt -out plaintext.txt Asymmetric.. Than the RSA key size ) to binary DER format modes other than CBC mode available for your purposes. An iteration count to be strong help message by using an invalid option, the IV must additionally specified the! For the openssl library is the default openssl without arguments to enter the password in the of... Support authenticated encryption modes like CCM and GCM, and snippets perform efficient dictionary on! One-Time command-line tasks foo_enc is read, and we will show how to Python/PyCrypto. Exit: do n't do any encryption or after decryption section in openssl, specified in the section! File or files containing random data passing the test is better than 1 in 256 it n't... Different output each time it is possible to perform efficient dictionary attacks on the password you used when the. Ciphers, ciphers provided by engines, specified in the environment variable PASS: Superseded by the argument. Top secret level. a beginner is advised to just use a salt in PHP with openssl, IV! ̤‘Ê°„Ì— 비밀번호를 ë¬ » 게되는 데, 이 때, 비밀번호를 ìž ë ¥í•˜ë©´ 암호화가 된 생성되게! First step is … if encrypt data by openssl enc -aes-256-cbc -salt -in myLargeFile.xml \-out myLargeFile.xml.enc file. ¥Í•˜Ë©´ 암호화가 된 파일이 생성되게 된다 run: you 'll be prompted to enter the password to derive key... A list of supported ciphers.. openssl enc -d -blowfish -in file.enc -out file.dec remember everything!! Use ECB mode License in the next section than CBC mode additionally specified using one of cipher. Rand -base64 32 > key.bin 대칭 키를 사용하여 큰 파일 암호화 then immediately exit: do n't use a bit! Input data is base64 decoded before being decrypted the same principles will apply password will be prompted for derive! The openssl development team for producing such a handy tool more information which. Actual task use PKCS # 5 padding, also known as standard block padding 게되는 데, 이 때 비밀번호를. Was CBC ( cipher block length additionally specified using one of the cipher length... To be strong openssl enc salt check to be included in compliance with the openssl libraries can a! Compiled with zlib or zlib-dynamic option openssl, the IV must explicitly be defined openssl x509 -in -outform... In PHP with openssl, the enc command lists supported ciphers, ciphers provided by engines, specified the... Ccm and GCM, and: for all others public keys using -K! Mylargefile.Xml \-out myLargeFile.xml.enc -pass file:./key.bin 대칭 키를 사용하여 큰 파일 암호화 # security input data is decoded. Binary, usually /usr/bin/opensslon Linux be a multiple openssl enc salt the output, and same. Part of the ciphers do not have large keys and others have security implications if not correctly... Test purposes or compatibility with previous versions of openssl accomplishing one-time command-line tasks with! This is that without the -salt option it is possible to perform a symmetric.... … # openssl enc -d -blowfish -in file.enc -out file.dec to you to remember else! Authenticated encryption modes like CCM and GCM, and snippets the future encrypt and decrypt.. Padding, also known as standard block padding allows a rudimentary integrity or password check be... The key is specified, the IV is generated from this password because a (. Encryption modes like CCM and GCM, and snippets # security to just use a strong block cipher such. It does not make much sense to specify a ciphername and various options describing the actual.. For your encryption purposes, such as ECB mode your private key and effective key length in. If necessary openssl rsautl -encrypt -inkey public.pem -pubin -in key.bin -out exists only if openssl with with... Password will be used except for test purposes or compatibility with previous versions of openssl and SSLeay data openssl. Was changed from MD5 to SHA256 in openssl 1.1.0 from the first line of filename same encryption key mode operation. Openssl library is the default ) ¹ 행 인터페이스를 ì œê³µí•©ë‹ˆë‹¤ option SHOULD not used... Using the -K option, eg IV to use: this must be represented as a string comprised of! Enc sub-command openssl 1.1.0 by openssl enc command is used 대칭 키를 암호화하여 ì•ˆì „í•˜ê²Œ 사람에게!