Key management involves the entire key life-cycle: generation, exchange, storage, safeguarding, use, vetting, revocation, replacement and retirement.

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171 views

Design of system based on HTTPS, Client Certificates and custom CA

I have the following system: 2 application servers. At the beginning is installed the first server and later is installed the second one. A client access from a browser to both servers Application ...
3
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1answer
2k views

What is the best practice for storing a secret on the cloud?

This post on Securing Java Application Data for Cloud Computing offers a good introduction to using a Java KeyStore for securing encrypted data in the cloud. It neglects, however, to answer the ...
3
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1answer
396 views

Help on interpretation of FIPS-140 paragraph

This is from the FIPS 140-2 standard: Cryptographic keys stored within a cryptographic module shall be stored either in plaintext form or encrypted form. Plaintext secret and private ...
3
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1answer
101 views

Why use “App Secret” in mobile applications?

I see some SaaS require to import "App Secret" into your application also with "Application Key". I understand the "Applicaton Key", but can not understand the "App Secret". Here is why: I can ...
3
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3answers
137 views

How can I securely and conveniently move keys, certs and other short data across an air gap?

What options are available for transferring data between unix machines separated by an air gap? USB flash drives Optical media eg CDs and DVDs Printed paper and Scanning+OCR QR Code software, ...
3
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1answer
2k views

How do I share my S/MIME public key?

I have setup S/MIME encryption for my email address, and I'd like to allow people to download the public key from my website, rather than having to first receive an email from me. I want the public ...
3
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2answers
244 views

Verifying the authenticity of a public key without manual intervention?

In RSA encryption it is said that ensuring the authenticity of the public key can be as important as the protection of the private key. An effective way of doing this is to have key custodians ...
3
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1answer
247 views

What dangers are there in storing my private key on different servers?

This question is specifically concerned with storing keys in the cloud, and is somewhat applicable. But I've got a laptop and a desktop computer at home - I'm the admin on both of those systems, and ...
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2answers
40 views

Preventing/Detecting forgery of logs generated in a potentially hostile environment

I have an application that runs on some host machine and generates logs. Later in the day those logs are securely transmitted to my machine. The problem is that while the logs are being generated I ...
3
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2answers
490 views

Export non-extractable private key from Keychain on OS X

I have a PKI certificate in Keychain Access.app on OS X 10.9, together with the private key. The manual page for /usr/bin/security indicates that there is a -x option for security import to specify ...
3
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1answer
100 views

Utility of multiple signing subkeys when we're restricted to a single encryption subkey in GnuPG (PGP)

As I understand it, GnuPG allows the creation of multiple subkeys, but multiple encryption subkeys are problematic because it's not clear which encryption subkey someone should use when sending a ...
3
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2answers
213 views

Signing my certificate by using my smart card and eID card?

In Belgium we have electronic identity cards (eID) issued by our government. They can be read by a smart card reader. On the card are two certificates, one for signing and one for authentication. I ...
3
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2answers
308 views

How can you securely generate keys on AWS?

Our application needs to generate secure keys for long term storage on AWS using openssl. But I've seen some instance where entropy falls dangerously low on AWS machines and this doesn't appear to be ...
3
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1answer
255 views

How secure is to store encryption keys or SSH Keys on LPAR?

I want to store SSH keys (used to connect to some devices that have sensitive data) and the encryption/decryption keys of a database application. They will be inside a LPAR (logical partition) in our ...
3
votes
1answer
237 views

How does firefox sync password recovery work?

According to Mozilla Sync-new-security-model, Firefox servers are not able to decrypt your sync data without your password. So I figured that, the browser generates a key from your password, encrypts ...
3
votes
1answer
189 views

Is Google API Key a sensitive information that needs to be protected?

I'm making use of google API for location (in Android, iOS apps).. Can the key be hardcoded? Or should it be protected? If It's sensitive, why is it sensitive and how can attackers exploit this?
3
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1answer
110 views

Can I ask GPG keyservers to name all keys signed by a particular key?

Given the alleged possibility that an adversary might attempt to acquire my (OFFLINE) Secret Certification Key and Passphrase and sign other keys with it, including a key they made with my ...
3
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1answer
623 views

Key Management: storing encrypted key in database and decrypted key in session variable

Edit: Rephrased title to hopefully get some interest on what I would have thought was a common issue ? I am developing a website using php/mySQL to store non-commercial data and it will be clearly ...
2
votes
2answers
289 views

Can unencrypted keys & logins be kept out of program memory?

No matter what technique is used to store encryption keys & logins, it seems that all roads lead back to program memory (as far as I know), as an unencrypted version of the keys & logins will ...
2
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3answers
849 views

In depth security: splitting key in different places

I use AES encryption on a website. At the moment, the key is stored in the source of the PHP script that does the encryption/decryption process thanks to openssl. I know that it isn't secure, so I ...
2
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3answers
5k views

How to store a private RSA key for an application?

I was wondering how an application that have a private key will keep it secure? If the private key is outside the binary, then anybody can access it, but store it in the binary doesn't make it more ...
2
votes
1answer
157 views

Passing generated keys to another process

I am doing a project in which one process generates a key using a distributed algorithm. I need to pass this key to the calling process or procedure. Generally speaking, one can do this in the ...
2
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3answers
138 views

AES Key Management / How To Swap Encryption Key

I'm currently using AES 256 for the encryption of my web application and the security policy context specifies that the encryption key must be replaced once every few months. When that happens what ...
2
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2answers
800 views

Encrypt+Signing data: PKCS#7 / CMS or do-it-your-own way?

Currently I'm saving an array of AES keys into a keychain as JSON, saved as a text file / SQL text column: { [ { encryptedAesKey:RsaEncryptedBytesBase64Encoded==, ...
2
votes
4answers
1k views

SSH: reusing public keys and known-man-in-the-middle

Usually, people recommend to use a single private-public key pair everywhere (if we're not talking about a possibility of compromising the private key): Best Practice: “One per-user ssh key” or ...
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2answers
92 views

Distributing public keys; with or without a sub-key?

Most of the public keys I am getting from friends have a sub key in addition to the pub key. For educational purposes I retrieved some public keys and came across this Linus Torvalds' key that does ...
2
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1answer
356 views

Using Diffie–Hellman key protocol to create a safe secret key

Let's say, I have a friend far from me and I want to send some secret messages to him. I have to say, I'm pretty newbie in security. That's why I'm wondering, does the Diffie–Hellman key exchange ...
2
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1answer
665 views

AES key management

I am encrypting a secret in a db field. I am encrypting using AES with a 256-bit key and a random IV per encryption. They AES key is hard coded in the code. Each IV is stored in clear in another ...
2
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1answer
303 views

Is knowing the decrypted and encrypted data enough to find the key?

Let's say an attacker knows the encrypted content, the decrypted content and the algorithm used: can he get the key that was used to encrypt the content or does it make it easier to find the key out? ...
2
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2answers
170 views

Does a self-signed certificate offer more protection than a public key?

I'm having a hard time finding the practical benefits of transmitting a self-signed certificate over simply a public key. I understand that a self-signed certificate proves the integrity of the public ...
2
votes
1answer
44 views

Security implication of exporting private key

I have a key pair stored in GPG Keyring. If I export it to an ASCII Armored format, am I removing any layers of security as long as the exported key stays on the same server as the key ring itself? My ...
2
votes
1answer
284 views

Bastion host that allows jailed users to SSH but protects private key

Basically, I'm trying to let the user use a private key without having read access to it. Use case: Employee needs to SSH to a server in the data center. There is 1 private key for all servers, ...
2
votes
2answers
94 views

RSA key exposure

Is there any limit to the number bytes that an RSA key can be used before it can be exposed. In Symmetric encryption a Key is not recommended to be used to encrypt more than specific amount of data ...
2
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1answer
708 views

How to process or manage Key-Encryption-Key using HSM?

Let's consider two Encryption keys: 1.Data-Encryption-Key(DEK) 2.Key-Encryption-Key(KEK) KEK will be securely stored in HSM, which will be encrypted using master key. Data Encryption Key will be ...
2
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1answer
266 views

Is it important to keep my pastebin developer key private?

I would like for my application to enable users to save their programs to Pastebin through the Pastebin api. This requires a developer key, which is automatically created with each account. Keeping ...
2
votes
1answer
173 views

Security of re-encryption with a list of pre-computed password based keys

I have a problem where an encrypted file stored on a server needs to be decrypted through a precomputed list of passwords that are used one time only - OTP applied to encryption basically. The file is ...
2
votes
2answers
2k views

DUKPT - Sample data other then in X9.24

I wrote some code that does PIN encryption/decryption according to rules in X9.24. It works great with examples provided in ANSI doc, but doesn't work with actual device from the client. Where can I ...
2
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2answers
54 views

Can the GPG master secret key be stored as read-only?

Once you have generated your master PGP key, will the "data" in the private key ever change? For instance, if you add another subkey, uid, or any other data to the master key, do these changes need ...
2
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2answers
319 views

How to maintain security and trust with a PGP keypair for a team or group of people?

I've seen many instances where a company or organization generates and uses a PGP keypair for a team or group of people. Most likely they all have a copy of the private and public keys on their ...
2
votes
1answer
532 views

How to change (sub)key usage of a PGP key?

gpg2 generates keys with one or several of the (S)igning, (E)ncryption, (C)ertification usages set. However, e.g. Enigmail creates a primary key also set for (A)uthentication, which GnuPG then shows. ...
2
votes
1answer
4k views

Where to store Java keystore password?

We are going to have a Java Key Store which will store certificates & public/private keys. This keystore will be protected with the password. However, access to the keystore is only from the ...
2
votes
1answer
51 views

SSH key passphrase update and multiply locations

I have a ssh key which I use to upload code to github. the private key is located on several locations from where I upload/download data. I wonder how can I update (or expire) old keys after I update ...
2
votes
1answer
114 views

Is it necessary to remove the primary secret GPG key from your laptop if it has full-disk encryption?

According to a number of articles, e.g. "Creating the Perfect GPG Keypair," it is advisable to have a number of subkeys in your GPG key, one for encryption, and one for signing, and then to (a) back ...
2
votes
3answers
137 views

Best practices for HSM's used by test and production systems

Should a test/demo/non-prod system be prohibited from using the same HSM as production? Since the same master key would be used for both test and prod it seems like it could raise eyebrows but I can't ...
2
votes
2answers
202 views

How can I secure the secret key?

I am a bit confused about securing the secret encyption key. Here is the scenario: I need to encrypt some data (file) This data will be read by a program (say written in C/C++). Both the program ...
2
votes
1answer
804 views

Storing encryption keys on a server using Node.js and MySQL

I am writing a web backend/api for an iOS application using Node.js and MySQL. In my database I have a table for posts. I would like the posts content to be encrypted. Let's say I'm using this AES for ...
2
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2answers
52 views

How secure is switching keys if breaking the key is an intractable problem?

Let's say that you create a system where a secret is hidden and revealed by a particular key. As well, the key can be broken, but it would take thousands of years. If you keep switching the keys ...
2
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2answers
367 views

Why doesn't Bitlocker mix the password with stored key?

Bitlocker doesn't support USB key + PIN (password). The reasoning was "the password is too weak to provide additional security". Isn't that flawed? With a USB key and password, I've got some level of ...
2
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2answers
605 views

Managing and deploying web app passwords

What are some best practices for managing and deploying web app passwords and private keys? E.g. the password to access a database or external services like the Facebook API. I'm referring generally ...
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2answers
141 views

Is there a hard-to-spoof identifier associated with a physical hard disk

I would like to salt the pass phrase with the drive id in such a way that, if the disk were imaged to a new drive with a different id, (e.g. by a government forensics specialist) then the image would ...