Encryption is the process of transforming plaintext using a cipher to make it unreadable to anyone except those possessing the key.

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How do I determine S/MIME encryption used?

From what I understand it seems that S/MIME uses PKCS #7 which can handle various different types of encryption. How is the choice of encryption method made by the e-mail client and how do I know what ...
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1answer
69 views

How to find encryption method?

How to find encryption method if both encrypted and decrypted code known? ...
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2answers
76 views

Security of this account login system

I have an idea to implement a account system using email and passwords for games. Im intending to have the account creation and forget password systems on a webpage. So if users will have to access ...
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0answers
61 views

How to secure my REST API once user authenticates with Google on mobile client?

In my application, I build REST APIs so that user can interact with my application server. Since I do not want to maintain User/Passwords, my iOS app authenticates client using Google. This all ...
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2answers
65 views

Byte swapping encryption algorithm security flaws?

Honesty commands me straight away to say that I'm not a professional, but I'm fascinated by data encryption. This algorithm won't be used in production code, so please don't flood me with "Don't ...
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2answers
3k views

What should I know before configuring Perfect Forward Secrecy?

PFS has gained attention in our audit department because of its innate ability to limit our exposure if someone steals our private key. What pitfalls or common mistakes should I be aware of before ...
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2answers
141 views

Is there any issue using the PHP crypt() function with an additional salt?

Is my PHP authentication script secure? I noticed that the hashes start with the first two letters of the username. Could there be a security flaw using crypt() in such a way? <?php // ...
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2answers
164 views

Is it possible to use bitcoin miners to decrypt files/communication?

My understanding is that miners solve complex algorithms (sha256 i believe) and receive bitcoins. With the amount of hash power all these pools get from miners couldn't they use the resources to ...
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3answers
149 views

how does the key size and algorithm strength affect encryption strength

The AES algorithm and asymmetric encryption use multiple key lengths that affect the strength on the key used. But, how does the key size and algorithm strength affect encryption strength?
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3answers
3k views

Is “Why Should You Avoid AES In MySQL?” true?

From a 2012 Smashing Magazine article quite a bold statement is made to avoid AES in MySQL itself. Or as they put it "Why Should You Avoid AES In MySQL?". However, if you search for SQL encryption, ...
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1answer
76 views

What is the best way to protect an encryption key? [duplicate]

I am using few secret keys to encrypt sensible date. What is the best way/place to protect the keys ? In a file located on my server ? Within the SGBG databse itself ? Or ... ?
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2answers
105 views

Store a file on a harddisk without root having access to it

Is there a way to store a file on a disk as a user so that even the root user has no access to it? I tried EncFS but that is no solution because the root user can switch to every user, so he/she can ...
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4answers
150 views

Password protect an excel file for a period of time?

I'm trying to find a way to password protect an Excel file (.xlsm) beyond the built-in password encryption options. Ideally: Enter the password File works for a week(/other period of time) After a ...
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4answers
244 views

What if I develop my own hash algorithm to create strong passwords from easy ones?

I came up with this idea but I cant figure out if it's good or bad, maybe you can help. My goal is: I want to create extremely strong passwords for my main accounts (gmail, skype and so on). I want to ...
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1answer
38 views

Substitute Key on 128 Bit Encryption

I'm trying to obtain a copy of program that uses 128 bit encryption, I've been denied since it could decrypt ANYTHING that anyone else has saved in it. I suggested giving me the program, but on mine ...
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0answers
32 views

Converting PGP2.x UIDs on a GPG key

I have a couple of keys which were created many years ago, before GPG came out. (But let's pretend there's only one key involved.) The key has a mix of GPG and PGP-2.x-style UIDs. I've made one of ...
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5answers
10k views

Is Windows BitLocker secure?

Naturally I feel that I have to ask this question, since it's a built-in feature in Windows. Let's say someone has physical access to my PC, is there an easy way for them to access a BitLocker ...
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0answers
54 views

Where to save digital content and prevent sharing?

I've been inspired by the answer to the question here: Location to store an encryption key It gave me a lot to think about. My friend and I are building a website and we've encountered a problem in ...
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0answers
33 views

Key differences between IPSec and HAIPE?

HAIPE is derived off IPSec but can someone draw up the differences between using IPSec with Suite B crypto and HAIPE with Suite B? We can drop Suite A or classified info for this question; staying ...
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0answers
61 views

Does cross platform (authenticated) volume encryption exist?

Note: this is not the same as What is a self-contained cross-platform encryption for USB drive?. I believe my question is on topic because I'm not asking for a recommendation. I'm asking if such a ...
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0answers
30 views

More known about high success rates of decrypting phone taps?

The Wiretap Report 2013, http://www.uscourts.gov/Statistics/WiretapReports/wiretap-report-2013.aspx#sa5 states that the number of state wiretaps in which encryption was encountered went up from 15 ...
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0answers
44 views

Private data encryption in database in case there is no password

I am currently investigating the architecture of the secure, but user friendly service, which combines storing of sensitive private data together with simple authorization procedure. The approach ...
0
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1answer
106 views

Advice on using encryption and hashing

I'm going to rephrase a question I asked earlier, as I don't think anyone understood what I meant. Bascially I'm writting a web based password locker, which can have multiple accounts; so that users ...
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1answer
64 views

Using encryption and hashing

I'm writing a project to securely store and share passwords between users, I've been doing tons of research into encryption algorithms, CSPRNGs, hashing algorithms, key stretching etc... I just want ...
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2answers
89 views

Isn't this the same as using a certification authority?

Taken from Wikipedia, here is the pretext to my question: A certificate authority (CA) is an organization that stores public keys and their owners and every party in a communication trusts this ...
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2answers
38 views

What is the likelihood of a government organization having a copy of the major .COM private keys? [closed]

This is a bit of a vague question, but it seems relevant these days with the information on all those "mass spying" programs getting leaked. I will describe the scenario and I just want to know if it ...
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2answers
99 views

What happens after setting up HDD password?

I am wondering what happens when I set HDD password in my laptop (Samsung with ssd). I mean a given case. I have been having working system without any password. Then one day I decide to set up HDD ...
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0answers
119 views

Best approach for storing banking information

I am currently developing an auction desktop application. At the moment I am storing the buyer and vendor information in 2 separate tables within a MySQL Database. Currently the data for these tables ...
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0answers
30 views

Securing user postal address in a database?

I've been assigned a web project that deals with shipping goods between two parties. I am unsure what a secure database scheme (if any) would be for storing the recipient's postal address and whether ...
2
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3answers
13k views

Recovering encrypted SD card after Android Factory Reset

I was using Active Sync on my Android Galaxy S2 and as a result it enforced encryption of the phone and SD card. Phone did a factory resync and now data on SD card is still encrypted. Is there a way ...
2
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3answers
242 views

How to store passwords securely in my server?

Disclaimer: I know I should use bcrypt to securely store user's passwords. Please, keep reading. I want to store credentials for several email services for each user. So if I log in with my username ...
2
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1answer
335 views

How can I secure IP Multicast traffic?

I'm interested in securing IP Multicast traffic for content that will be sent globally with several low bandwidth receivers. I understand that simplified Broadcast encryption takes N public keys ...
3
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3answers
108 views

How to check that an e-mail service provides encryption between the mail servers?

How can I technically verify* that the e-mail I'm sending from Gmail to Yahoo is encrypted all the way from Gmail's servers to Yahoo's servers? I know that it's advised to have encryption between the ...
29
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3answers
1k views

Why do WordPress installations retrieve the crypto secrets remotely on installation?

It seems that WordPress retrieves all the crypto constants remotely (via HTTPS): // setup-config.php $secret_keys = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' ); Are there ...
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2answers
210 views

What should I do when I need to store passwords for usage in 3rd party software?

I have a desktop WPF application which authenticates with Dynamics CRM 2011. I ask for the username and password of the user and use them to connect to Dynamics CRM 2011 using ...
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2answers
127 views

Crack Unknown Encryption [closed]

I was challenged by a friend to decrypt a piece of text that was somehow encrypted. The encrypted text is the following: ...
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2answers
62 views

Public e-mail Encryption Certificate

I'm quite new to this, so don't be too hard on me. I'm currently using the CipherMail MTA to generate e-mail encryption certificates. I created an own CA and public and private keys for our contact ...
50
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9answers
11k views

Is there any technical security reason not to buy the cheapest SSL certificate you can find?

While shopping for a basic SSL cert for my blog, I found that many of the more well known Certificat Authorities have an entry-level certificate (with less stringent validation of the purchaser's ...
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3answers
161 views

Is storing the private key and public keys in same directory on server recommended, like OwnCloud does?

Is this recommended or a good/normal practice? I think not. Because I saw that OwnCloud stores all encryption keys in one directory on the server. One directory contains the private key(s) and one all ...
0
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3answers
472 views

Protecting data through an XOR operation with sufficiently long keys

Suppose two parties S and D would like to protect a communication channel. Therefore, S and D exchange two sufficiently long key sequences SB und DB of random bits over a secure channel [e.g not over ...
0
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1answer
56 views

Gmail Voicemail Encryption

I want to listen to my voicemails in a secure but convenient fashion. I plan do this by having my PBX encrypt the voicemail using openssl aes 256 cbc with salt and a single static password. The ...
0
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1answer
65 views

CBC-R Cookie Encryption

I would like to start by saying I'm not looking for someone to write a script for me, or even tell me how to do so. I just want to have a good understanding as to how CBC-R works with Laravel cookies. ...
11
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3answers
8k views

Checklist on building an Offline Root & Intermediate Certificate Authority (CA)

Microsoft allows a CA to use Cryptography Next Generation (CNG) and advises of incompatibility issues for clients that do not support this suite. Here is an image of the default cryptography settings ...
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0answers
47 views

A Suitable Replacement for MCrypt?

I hope this is the appropriate audience for my question. I'm rewriting a legacy PHP web application that makes heavy use of MCrypt. It's on a shared host and handles payment data as well as personally ...
0
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1answer
61 views

Encrypting a symmetric key or Small File using TPM and Windows (TBS?)

I'm looking at encrypting a small (500bytes) file using the TPM. This is either doing assymetric encryption with the TPM directly, or using the TPM to store a symmetric key for decryption. This needs ...
12
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2answers
1k views

Why use 256-bit symmetric encryption in TLS when 2048-bit RSA doesn't even offer 128-bit strength?

I've noticed that websites start to use 256-bit symmetric encryption, but often still end up using 2048-bit RSA keys. http://www.keylength.com/en/3/ The link above displays the ECRYPT II ...
0
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2answers
85 views

Is a long salt usually sufficient for security purposes, even with MD5?

I always hear that MD5 is too fast for effective password crypto because you can crack up to 6 characters very quickly (or is this number higher now)? But what if the salt you use is really long and ...
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1answer
80 views

Android's Encryption mechanism

Well, according to my Android smartphone, it says the phone has been encrypted. Should I be worried if it has a malware or if I get hacked because I once clicked a link on a certain website then I ...
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2answers
393 views

Encrypted code file (.vbs) hide all my files and shows .lnk files

I am using Windows XP Professional and what happens is that when I try to connect any gadget like a pen drive or a mobile through USB, all my data got hidden and it shows a 1 kb file which is a .lnk ...
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2answers
115 views

iMac Keylogger and other hacks

Ok so I have someone hacking my computer, this person lives in my home. I know i have a key logger and a few other things that are making my computer vulnerable etc. My question is how do i get rid of ...