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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424 views

Would a per-file encryption system any more or less secure than volume encryption?

Guessing they're the same, but not 100% sure. UPDATE: My mistake for not clearly stating the it would be assumed the keys per-file, or for a whole volume, would be the exact same -- not to mention ...
1
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1answer
330 views

Should I mount my mac Truecrypt Volume elsewhere?

I've read in various places to not mount your truecrypt volume in the same place as your Dropbox or Sugarsync folder. I believe this only matter for Mac/Linux, but I need some verification. On a Mac, ...
3
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1answer
2k views

Storage of 'secrets', keystores, HSMs and the rest

I've been digging for the past few days into storage of sentitive data. If I store this data in a database, I believe the general accepted practice is to store sensitive data encrypted, for various ...
55
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7answers
16k views

How hard is it to intercept SMS (two-factor authentication)?

A lot of two-factor authentication mechanisms use SMS to deliver single-use passphrase to the user. So how secure is it? Is it hard to intercept the SMS message containing the passphrase? Do mobile ...
0
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5answers
931 views

What voip client support manual encryption?

In pidgin there is a plugin that we can use to encrypt our messages in chat windows .. Is there anything simular for voip (pc to pc) ? any client that support manual encryption for voice data?(linux)
5
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1answer
708 views

Is BitLocker on a virtual machine FIPS 140-2 security level 1 compliant?

BitLocker can be used as a cryptographic module to fulfill FIPS 140-2 security level 1 compliance. What if the encrypted drive is on a virtual machine, is that still FIPS 140-2 compliant? In one ...
0
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1answer
878 views

Is Data Object on openPGP smartcard v2 encrypted?

currently I thinking about on-the-fly disk encryption using Truecrypt/dmcrypt LUKS with key stored on smartcard. I would like to use openPGP v2 smart card, respectively GPF Cryptostick which is based ...
7
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2answers
1k views

How to encrypt a password stored in a database (need to decrypt later)

I am working on a system that can connect to any number of different systems. Someone inputs the credentials for a system to connect to, and my system remembers the credentials and uses them to ...
1
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1answer
761 views

PAP and CHAP implementation using Java

I want to implement PAP and CHAP based authentication in my Java project how can I implement ? is there any API available in Java for using that protocol ?
3
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1answer
888 views

Cipher Key Length versus Encryption Bits

I am trying to add encryption functionality to a PHP script, modeled on an existing C# application. The C# app uses the Rijndael algorithm with default constructor. From this I am able to determine ...
6
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2answers
455 views

With Google's new Privacy Policies going into effect soon, how can I better protect myself using their services?

From what I can tell, the gist of the new Privacy Policy from Google is that they're making a blanket policy to allow using your data between all their services, however they see fit. So now one ...
4
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1answer
380 views

What does colluded truncation attack mean?

I'm doing my final year engineering project. I went through some ieee papers and came across something called colluded truncation attack. Can someone explain what it is. I'm planning to do the project ...
5
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1answer
925 views

Do TrueCrypt volumes look like random data?

Let say I use Eraser (or other tools) to erase my hard drive (using DoD standards which is 7 times or Gutmann which is 35 times), These eraser tools just write random data on the hard drive many ...
10
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3answers
849 views

Encryption-Laws in Iran

According to this article Iran has criminalized the usage of encryption and VPNs. According to this blog post it is still possible to use SSH tunnels in Iran. For me SSH is encryption and thus ...
4
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4answers
976 views

Are backups of truecrypt volumes with different pass phrases a security risk?

Lets say that I periodically change the pass-phrase on a truecrypt volume. The volume is regularly backed up, so my backup system has many copies of that volume, many of which have a different volume ...
6
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1answer
1k views

Bcrypt as a key derivation function?

I read a lot of entries at stack exchange about bcrypt and why it is supposed to be better than PBKDF2 in terms of password storage. I'm asking now if bcrypt is better than PBKDF2 in terms of key ...
4
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2answers
1k views

What cryptographic module does Sql Server 2008 use to run in Fips 140-2 compliant mode by default?

One can configure Sql Server 2008 to run in FIPS 140-2 compliant mode, in the same manner as running Bitlocker in FIPS 140-2 compliant mode. Which is to activate FIPS 140-2 compliant mode in the ...
3
votes
4answers
600 views

Base64 conversion for byte array in encryption

I am using ECC algorithm for security. Now the concern is I am placing the data in web page after encryption of the data in hex format and transmit to server and then it decrypts the data, but when I ...
5
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2answers
2k views

openssl_digest vs hash vs hash_hmac? Difference between SALT & HMAC?

openssl_digest vs hash vs hash_hmac I want to use SHA512 for storing password. Which of the above methods are best to use? Why? What is the difference between SALT & HMAC? I just read ...
8
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1answer
447 views

Protecting emails in your database

It's common to encrypt passwords in the database, but I'm wondering what solutions are out there to protect emails in your database. Not just from hacking, but from disgruntled employees or engineers ...
3
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1answer
3k views

What algorithm/encryption type does Gmail use for security?

In the wake of the recent database hacks, i.e. Sony, Gawker, etc.. where the hackers have access to the hashed usernames and passwords, i've been more keen in paying attention to the sites and ...
23
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5answers
3k views

Do spaces in a passphrase really add any more security/entropy?

I often see passphrase suggestions written as a sentence, with spaces. In that format are they more susceptible to a dictionary attack because each word is on it's own as opposed to a large unbroken ...
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1answer
2k views

Are there any reviews or user experiences with Secretsync?

I haven't been able to find much in the way of professional reviews for Secretsync - http://getsecretsync.com/ss/ But i'm wondering how it compares to Boxcryptor and Truecrypt. How secure is ...
2
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2answers
383 views

What does “if the Crypto Officer performs this operation” mean in this BitLocker security policy?

In the document Windows Server 2008 R2 BitLocker™ Drive Encryption Security Policy For FIPS 140-2 Validation, in the section 6.1.2 FIPS 140-2 Security Rules bullet point 2 it says: BitLocker™ will ...
7
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7answers
2k views

Verify the password of an encrypted file without waiting for complete decryption

I am currently working on an application that encrypts files with AES 256. The problem is that I want the user to see whether the password is wrong before the file is decrypted. For example if you ...
3
votes
5answers
374 views

Exchanging private keys

I would like to understand something about security. Say two parties have a private piece of data (e.g. a password or license key) and the receiver needs to know that the sender has the same key and ...
6
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3answers
981 views

How secure are self decrypting HTML files for data storage?

I recently came across a JavaScript self decrypting archive. Is it secure enough to be used as a portable password storage tool? The author has even challenged it to be cracked.
7
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1answer
3k views

SSL encryption and SSL certificates

I know for a fact that it's possible for for an SSL\TLS session to go on without an SSL certificate, meaning you pass encrypted data, but you don't have a solid foundation of who you are really ...
9
votes
3answers
6k views

Storing Credit Card Numbers

I'll be making a website with a membership type of option for the website, and I'll be most likely using Authorize.Net to make the transactions, however, I need to know what kind of encryption I can ...
2
votes
1answer
930 views

Which crypto-algorithem uses iOS in NSDataWritingFileProtection and what is the keysize?

I need to know the crypto algorithm and key strength of NSDataWritingFileProtection. I would like to know the same things for using the Keychain and NSFileManager. I searched the Apple Developer ...
2
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1answer
509 views

Does Bitlocker qualify as the 'Cryptographic Module' defined in FIPS140-2?

Wikipedia defines Bitlocker as: BitLocker Drive Encryption is a full disk encryption feature included with the Ultimate and Enterprise editions of Microsoft's Windows Vista and Windows 7 ...
4
votes
1answer
395 views

Thoughts on creating unscalable conditions to brute force even small passwords?

I stumbled upon something called "scrypt" which claims to add fixed time/space complexity requirements into password-based key derivation. Quoting from their page: A simple password-based encryption ...
13
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4answers
6k views

What are you doing when you move your mouse randomly during a truecrypt volume creation?

Is that called a 'round' every time you move your mouse when creating a new volume? I'm talking about the screen with the random numbers during the volume creation process. What is the purpose of ...
5
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3answers
1k views

Will editing a Word file from a mounted Truecrypt volume leave any trace behind on the host computer?

I've heard that even if you have a Word document encrpyted (just using the built in Word encryption tools) and are editing it, it can still leave behind remnants of a file on the local computer in ...
3
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1answer
465 views

HP ProtectSmart In A Domain?

All of our HP PCs come with this software pre-installed, I'm a bit inclined to outright remove it because: Credential manager stores passwords by default (this has lead to user confusion, plus ...
8
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2answers
11k views

sniffing/recording GSM 3G signals

Is it possible to sniff or record and process GSM 3G signals (from some reciever) given that there is no other signals interrupting etc (the most comfortable conditions) Update (with some supporting ...
0
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3answers
1k views

Why do some LUKS tutorials mention overwriting the partition with random data?

On a lot of tutorials on luks encryption, people say to override the partition with random data, so that data is not recoverable after encryption. I don't understand that. Will the random data be ...
6
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4answers
1k views

Encrypt files on flash drive for easy decryption

I am looking to give some files to my accountant, who is not computer-savvy. I am going to put the files on a flash drive encrypted. I assume, accountant has no software other than standard Windows ...
21
votes
6answers
8k views

Is AES encrypting a password with itself more secure than SHA1?

This isn't really a practical question, but more a question of curiosity. I heard a CS professor recommend stepping up from md5ing passwords not to SHA1, but to AES encrypting the password using ...
7
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3answers
250 views

Searching encrypted storage

I have been reading some very interesting academic papers regarding the ability to search encrypted data without needing to actually decrypt the data. Doesn't this defeat the purpose of encryption in ...
7
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10answers
4k views

How can I share files with other individuals using the cloud in a secure way?

I would like to use a dropbox because it is easy and convenient. But I want to encrypt the files with the public key of the intended recipient, so he will be the only one who can access the data in ...
9
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4answers
2k views

How would you analyze an image to find out if there are scripts embedded in it?

How would you analyze an image to find out if there are scripts or possible malware embedded in it? What tools / methods to use?
9
votes
2answers
95 views

Do I need to password-protect an “Electronic Copy” of health information given to a patient on e-media?

I'm struggling to find good documentation regarding requirements around security and encryption of patient clinical information when delivered to a patient in electronic format. Patient portals, ...
9
votes
3answers
5k views

Can I use a private key as a public key and vice versa?

I have code to encrypt data using a public key and decrypt it using a private key. This is useful when a client wants to send data to a server and know that only the server can decrypt it. But say I ...
3
votes
1answer
766 views

Sip call Developing in android with secure data transfer

I would like to make an application similar to RedPhone on android. I took a look at SipDemo from developer.android.com and at the android.net.sip package.My question is, when you make/receive a call, ...
4
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1answer
574 views

Android for the Paranoid

In the case of a rooted phone, what are the various options to stay anonymous and keep your data secure? I've seen the guys at The Guardian Project work towards this: ...
0
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1answer
367 views

Enterprise Encryption Considerations

What are the different aspects to consider for Enterprise Encryption policy? So far the resources I have are: https://www.owasp.org/index.php/Cryptographic_Storage_Cheat_Sheet ...
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3answers
1k views

Secure PXE network OS installation

How can one make sure that when PXE is being used to boot a remote operating system, that the data being sent is encrypted (or at the very least that integrity is maintained)? Would it be possible to ...
5
votes
3answers
1k views

Best user data encryption design patterns?

Let's say that I have a website that allows users to upload files (much like Dropbox), and I need to encrypt those files so that only the users that have access to them can view the file data. Users ...
0
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3answers
504 views

Best protection against a “chosen-ciphertext” attack?

What is the best protection against a "chosen-ciphertext" attack when transmitting (=streaming) secured (=crypted) data via networks using the TCP protocol?