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

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Encrypting user credentials using AES: how to hide the key

One of my software (an R package) has to save on disk users sensitive information. I encrypt such information using AES encryption using a random key that is generated at the moment of installation ...
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1answer
69 views

NISTIR 7966 (Security of Automated Access Management Using Secure Shell) - is there anything new?

Tatu Ylönen (the creator of SSH protocol) and two others authored a report recently, offering their views on SSH key management. I have read the report, and am struggling to identify whether it is ...
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0answers
24 views

May .pfx file contain more than one private key? [migrated]

I am trying to understand whether .pfx file may contain multiple private keys or not. In case there are several sets of certificates and their private keys how they can be found in KeyStore? By using ...
30
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2answers
4k views

Criteria for Selecting an HSM

A very sensitive application has to protect several different forms of data, such as passwords, credit cards, and secret documents - and encryption keys, of course. As an alternative to developing a ...
0
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1answer
81 views

What are the best practices to store payment processor dev/API keys?

I am integrating with multiple payment processors which have their set of public/private keys. This would be used in conjuction with per user keys, to bill clients. I was wondering what is the best ...
74
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2answers
5k views

How are private keys kept private?

This may sound like a stupid question but seriously how are private keys kept private? If you're someone like Google you have some huge number of servers to which the public can establish secure ...
0
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1answer
83 views

Is it dangerous to use the same key (RSA) for both encryption (PGP) and authentication (SSH)?

Alice wants to send an encrypted message to Bob, but she also wants to connect to Carol's server. Are there any dangers associated with using the same RSA key for both PGP and SSH (other than a lack ...
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2answers
58 views

Management of server keys

I plan to put an SSH server on micro-controller devices. There shall be many devices distributed in a wide range. The identity of the server is checked with the server key. The server needs to store ...
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0answers
25 views

GPG: Import UID [on hold]

I have not yet submitted my keys to a keyserver. I have one UID, but I wish to change its email address. As my master key is only saved on an encrypted USB device, I performed the following steps: ...
2
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1answer
264 views

Current industry standard key management solution for web app on linux host

The scenario: Data is sent to an application server and you want to selectively encrypt some data before sending it to a DB server for storage. All servers run some linux distro. This is a relatively ...
5
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1answer
105 views

How are symmetric cryptographic keys stored?

If you have a symmetric key which is negotiated via SRP protocol between a mobile device (e.g. smartphone) and a server, what would be a safe way to persist this resulting key on each side? On the ...
2
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1answer
94 views

Strategy for encryption before cloud storage

Apologies if this has been asked before. I am looking to encrypt documents before storing in the cloud. There will be a separate metadata storage, which could be either internal or cloud hosted. My ...
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1answer
271 views

Protecting decryption key on server

What is the most suitable way to encrypt and decrypt sensitive data on a public cloud server disk without storing the decryption key on the server in plaintext? REQUIREMENTS In our SaaS web/mobile ...
32
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2answers
5k views

I accidentally published my SSH key passphrase, what to do?

So I mistook input fields and now my SSH key passphrase is visible to the world, and I can't even remove it. Now as far as I understand, this is not an immediate security concern, since the ...
1
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1answer
25 views

Digital Certificate Repository Integrity

I am trying to figure out if there is an automatic way to determine if a digital certificate repository has been tampered with. Does anyone know of a way to do so?
1
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1answer
72 views

Any way to revoke old key pair?

There is a many-year-old 1024 DSA key in the public keyservers under my name. There is a 2048 ELG-E subkey for it. I didn't create these keys, they were created for me by a former employer without my ...
0
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1answer
31 views

Best practices for encryption from web<-> specific client

If we want to allow sensitive data between a web server and specific client only, is there anything more that can be done besides the following? Note that this is potentially a duplicate of ...
0
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1answer
30 views

JKS is readable without providing a password

I'm at that stage in application development where I'm forced to tinker with openssl and keytool again. I was surprised to find that I could list and export certs from a JKS key store without ...
3
votes
1answer
83 views

Asymmetric / end to end encryption for web messaging app

Background I'm trying to design a secure and sustainable web app for messaging. The purpose is to learn how to create secure web application. The application is suppose to be written in Javascript ...
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0answers
22 views

JKS - Keystore protection and configuration file

It appears that Java Keystore is often used by web server using a configuration file, with the password opening the JKS written in it and also the password protecting the specific entry. How could ...
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1answer
375 views

Secure private key storage

In light of BadUSB, storing private keys on a USB flash drive is not the best way. What about writing private keys to a CD? What I am worried about is whenever I plug my private key storage device ...
2
votes
2answers
112 views

How to properly transition from standard PGP keys to using subkeys?

When I initially set up PGP, PGPTools didn't prompt me to create separate subkeys, as explained in the article "Creating the Perfect PGP Keypair". Now that I've learned a bit more about PGP, I'd like ...
0
votes
1answer
78 views

Safely encrypting data received through HTTPS

I am receiving sensitive data over an HTTPS connection and need to store this on disk, encrypted so no one can tamper with it, but for reading later on. Each user in the system has a password. The ...
3
votes
1answer
83 views

How to deal with SSH keys in insecure environment

I am trying to find out a "safe" solution for the following situation. tl;dr how to keep things secure in an environment that is absolutely not? I work in a company where workstations are not safe ...
3
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1answer
37 views

Short OpenPGP key IDs are insecure, how to configure GnuPG to use long key IDs instead?

Short OpenPGP key IDs (with 32 bits / 8 hex characters) are subject to collision attacks. It is strongly recommended to stop using 32 bit IDs: Stop using 32bit key ids It takes 4 seconds to ...
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1answer
34 views

User Key pairs and Man-in-the-middle issues

I'm trying to wrap my head around how to exchange user's keys with a server. Maybe during sign-up a JS applet generates a key-pair for the user. These keys would be used for signing subsequent ...
1
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1answer
46 views

Single vs server specific ssh keys?

This question has a bit to do with procedure. Is it better for a person to have one single ssh key pair and share the public key where needed. Alternatively is it better to have server specific keys? ...
2
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2answers
114 views

Expiration / enforce change of passphrase for private ssh keys

Out of curiosity, and also to check whether this is doable at all: Is there any way using standard tools to assign an expiry date [only] to the passphrase of an ssh private key, or to enforce the ...
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1answer
22 views

GPG: Detaching Public Subkeys - why can't I do it?

I understand the benefits of using subkeys. I also know that, in the case of private keys it is possible to detach the subkeys from the master key, since there are times when a user may prefer not to ...
2
votes
1answer
24 views

Is android's FDE secure from offline attacks?

Android provides FDE, but it uses lockscreen pin, which is (at least in my case) fairly weak (like a 4-digit PIN). Does it mean that my FDE could be easily broken by offline attack? Or maybe master ...
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1answer
22 views

How can i store encryption key into Microsoft provided Key container?

I'm working on an application in which user will enter encryption key via GUI and my app will fetch that encryption key. Now i need to store that received key into Microsoft key container. I got this ...
0
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1answer
39 views

Encyption Key Storage and floating point encryption

I am working on a web application where I need to encrypt some fields based on user configuration and display the decrypted information. The field values can be text or integers or floats. We are ...
16
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4answers
3k views

Is it dangerous to publicly share ciphertext?

Alice wants to share a message with Bob, but Alice and Bob can never be in the same place at the same time. We can assume they both know each others public keys (or agreed on a shared key, if that ...
4
votes
2answers
108 views

Malware known for stealing private ssh keys

The ssh private key file, stored under ~/.ssh/id_rsa in many *nix distros, is typically owned by the user, allowing any program invoked by that user to read the file, and perhaps upload it to a remote ...
5
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2answers
76 views

Why don't PGP keyservers enforce double-opt-in?

One thing that I found out when starting using PGP: When I uploaded my keys to the SKS keyserver, the keyserver did not take any action to verify that I am who I claim to be. Since a PGP key contains ...
235
votes
7answers
181k views

RSA vs. DSA for SSH authentication keys

When generating SSH authentication keys on a Unix/Linux system with ssh-keygen, you're given the choice of creating a RSA or DSA key pair (using -t type). What is the difference between RSA and DSA ...
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0answers
38 views

How is Tresorit client-side encryption key stored and managed?

I am using Tresorit on Mac OS X and iPhone. When I am using it there is always applied client-side encryption before posting the file to cloud. The key used for encryption is AES-256 and CFB mode of ...
4
votes
2answers
236 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?
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0answers
21 views

CCM instead of key wrap

Is there any instance of NIST or other encryption standards using AES-CCM to encrypt/authenticate key data? I would like to use CCM over a keywrap function, but cannot find any precedent for this in ...
1
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1answer
61 views

P12 private key vs private key file : what is more secure?

The question is a bit tricky because they don't have the same purpose but : Do both kind of file face the same security issue concerning private key protection : password strenght ? (PBKDF2 as both ...
0
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0answers
27 views

Distribution of key by server

I have read that in asymmetric cryptography, a system admin can generate key pairs on the server. After that, the users will be given the generated key pairs and this is an efficient way of doing this ...
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1answer
60 views

Best practice for https Private Key Generation

I am working with a security person that baffles me a bit with the practices he performs. Besides the issue of this person insisting on bypassing every security measure in place we have got into it ...
6
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1answer
74 views

User IDs containing URIs

When adding a User ID to your OpenPGP key, you are typically asked (for example by GnuPG) to provide a name, a comment, and an email address (where each part is optional). This format (Name (Comment) ...
0
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1answer
32 views

PKCS#12 File - security impacts when imported in Web Browser or Windows Store?

When a PKCS12 file is imported into a Web browser or Windows store the user is prompted for private key password. How does the browser or operating system manage this password? Is it secure?
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1answer
83 views

AES 256 bit key to plaintext conversion? [closed]

I'm a little rusty on cryptography, but I have successfully acquired a 256 bit key that is used for encryption and I want to know if it is possible to reverse it into its corresponding plain text ...
1
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1answer
42 views

Bus smart ticketing systems and EMV

I have recently started to study the smart ticketing systems. Most of the modern systems support the use of EMVCo standards for buying tickets in the bus. Also, in each bus usually there are more than ...
26
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4answers
3k views

What's the common pragmatic strategy for managing key pairs?

I have a small number of different workstations (plus client devices like iPhone) that I use for to connecting to numerous servers using SSH. Originally when I learned about PKI, I created a single ...
77
votes
7answers
39k views

How should I distribute my public key?

I've just started to use GPG and created a public key. It is kind of pointless if no-one knows about it. How should I distribute it? Should I post it on my profile on Facebook and LinkedIn? How about ...
12
votes
3answers
2k views

Does GPG key expiration add to security?

I've created a new GPG key to sign a software package in a source repository with an expiration date three years from now. It seemed like a good security measure because if the key is compromised or ...
0
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0answers
14 views

Why do PGP Keys have expiration dates? [duplicate]

I read a tutorial to get started with PGP and so far I understand the importance and the difference between encryption, decryption, signing, and verifying. However, I don't understand why a key has ...