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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What are the benefits of encryption for everyday people?

In addition to the fact that encryption systems like PGP are notoriously difficult to use, and that encryption doesn't always jive with cloud-based services like webmail, the fact is that most people ...
4
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3answers
2k views

Bittorrent Sync encryption

Sync, a new product from BitTorrent, Inc., has been cited as a viable alternative to other cloud-storage platforms. The Sync FAQ indicates that an encryption scheme is being used, but does not comment ...
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2answers
72 views

Storing AES password for verification

I was wondering if such practice would be safe: I have a table that stores encrypted notes Every note has a data field and a password field When a password is entered, i want to select all notes, ...
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0answers
42 views

How is PBEWITHSHA256AND256BITAES-CBC-BC used to derive a key that can in turn be used as a key to encrypt using AES in CBC mode? [closed]

The user password is expected to have very low entropy. The salt that is to be given as one of the parameters to the PBE will be generated per user. I should use a different IV for each AES ...
0
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1answer
26 views

Is there an AES 256 LUKS encryption option in Fedora? [closed]

I have certain information on my drive that I don't want anyone (not even me ;) ) to gain access to. I read recently that Fedora only offers EAS 256 LUKS encryption. This just isn't secure enough ...
12
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0answers
2k views

Should I Use Base64 or Unicode for Storing Hashes & Salts? [migrated]

I have never worked on the security side of web apps, as I am just out of college. Now, I am looking for a job and working on some websites on the side, to keep my skills sharp and gain new ones. One ...
1
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1answer
48 views

How can you check if a private key and certificate match in OpenSSL with ECDSA?

I know how to do this with RSA keys (see this article: Determine if private key belongs to certificate?) however I do not know how to do this for ECDSA certificate / key pairs. With RSA keys, the ...
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3answers
95 views

Potential risks when sending plain text E-Mails with encrypted attachments?

To ensure privacy in communication I encrypt and sign E-Mails using gpg4win. However, sometimes the communication does not work as expeceted (GPGTools and Outlook/gpg4win seem to be incompatible). In ...
0
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1answer
49 views

bitlocker and data retrieval

The data on my hard disk was deleted from an encrypted bitlocker hard disk. After deleting the data, a new partition including a new installation of windows was created on the same hard disk. The key ...
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2answers
146 views

Stream/block cipher add a simple hash to guarantee integrity

The question is simple: Adding a hash to a message and then encrypt it using a stream cipher / block cipher. Why can't this guarantee integrity of the message upon decryption?
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2answers
54 views

Storing CardHolder Data using RC2 encryption

I would like to know if storing credit cardholder data using RC2 encryption requires to be compliant with PCI DSS. Currently the 16 digit PAN number and expiry date is stored in the database. The PAN ...
0
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0answers
22 views

Rabin Cryptosystem Problem (variant) [migrated]

My understanding of Rabin We have p and q which are distinct primes congruent to 3 mod 4. Then we have n = p*q. Encryption is done as e(m) = m^2 mod n, where m is our message. Decryption is done ...
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3answers
2k views

Tell people that I can encrypt emails

I know that it is still not very easy to use PGP for an average user. However, the situation is improving (there are some easy plugins that can even nicely integrate into your GMail webmail). In ...
16
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2answers
2k views

Flaw in encryption through pseudorandom number stream (from PGP documentation)

I was reading PGP docs and came upon a part written by Phil Zimmermann (PGP's creator) that piqued my curiosity: When I was in college in the early 70s, I devised what I believed was a brilliant ...
1
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1answer
238 views

Requiring 2 keys to access a content

I need to use an external service that can only be accessed by password. I don't like the idea of storing the plaintext password on the server, but AFAIK there's not much I can do. Considering this ...
8
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2answers
8k views

Is it possible to use the aircrack-ng tool to crack a WPA2 Enterprise network?

is this tool (aircrack-ng) capable of cracking into a WPA/WPA2 Enterprise network? This tool has major success cracking the passwords of WEP/WPA networks. If it can, how, but if not, is there another ...
2
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2answers
172 views

Obstacle in Implementing a Time Limited/Number of Use Limited Software

How does one implement a trial period in a product properly, e.g. a trial period that lasts 30 days, or limits the number of product uses to 10? Storing the entries, even in an encrypted form, isn't ...
1
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1answer
74 views

Real time application of AES and DES [closed]

I am writing a paper on reducing the power consumption of security protocols. I am having trouble identifying sources that describe real-time usage of DES and AES, and how often they are used. I plan ...
4
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3answers
141 views

Anonymiszing sensitive data in MySQL DB while retaining searchability [closed]

I have a MySQL database that stores sensitive (personal) data about individuals; and have been tasked with ensuring that this data is encrypted in some way to protect the individuals and their data if ...
9
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4answers
2k views

Truly deniable encryption

What tools can be used to make truly deniable encryption? Suppose, authorities can use any force to make you open your passwords. Truecrypt can have only one hidden container, which means that ...
3
votes
1answer
102 views

Can Fiddler decrypt HTTPS traffic when using elliptic curves + client cert authetication?

Case 1 involves TLS + client certificate authentication with both client and server using secp384 based EC certificates. In this case, when monitoring traffic via fiddler, the tunneling/handshaking as ...
3
votes
2answers
417 views

In a browser web server communication, who decides which encryption protocol to use [duplicate]

My IE browser has SSLv3.0, TLS 1.0,1.1 and 1.2 has enabled in the advanced settings. And (I was informed by my server admin) my web server can encrypt data in SSLv3.0 and TLS 1.0 Now which system ...
1
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1answer
228 views

How does Bitlocker only-PIN method work?

Microsoft explained USB-key and TPM based BitLocker decryption process on this article. USB-Key process: The steps in the illustrated sequence are as follows: 1- The operating system starts ...
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2answers
184 views

iMac Keylogger and other hacks [closed]

I have someone hacking my computer, this person lives in my home. I know I have a keylogger and a few other things that are making my computer vulnerable etc. My question is: how do I get rid of the ...
12
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6answers
13k views

How secure is NTFS encryption?

How secure is the data in a encrypted NTFS folder on Windows (XP, 7)? (The encryption option under file|folder -> properties -> advanced -> encrypt.) If the user uses a decent password, can this ...
0
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1answer
25 views

Mechanisms to prevent error propagation in wireless networks with respect to the avalanche effect [closed]

I was wondering what mechanisms exists that could be used to prevent error propagation in wireless networks and especially with respect to the avalanche effect. I know ARQ and FEC can be used, but ...
10
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2answers
592 views

What role does clock synchronization play in SSL communcation

We've recently implemented WS Trust security over SSL for our client / server communications. Our application is used by thousands of our customers, spread out all over the world. One of the ...
1
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1answer
82 views

Encrypting sensitive data in a financial form

I'm currently building a B2B E-Commerce site for a client using WordPress. We sell industrial machinery ranging in the upper $100k-$400k price range. My client would like to have their financing form ...
0
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0answers
9 views

DiskCryptor error. Can it be fixed? or what equivalent disc encryption software should be installed? Thanks [migrated]

DiskCryptor is giving me the error: "Not enough space after partitions to install bootloader. Install bootloader to first HDD track?". Then after clicking YES, I get "Error code: 20" then upon ...
97
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2answers
54k views

What is the difference between https://google.com and https://encrypted.google.com?

Is it there any difference between the encrypted Google search (at https://encrypted.google.com) and the ordinary HTTPS Google search (at https://google.com)? In terms of security what were the ...
0
votes
2answers
170 views

Using different algorithms to slow down GPU password cracking [duplicate]

I have some job related files I have already compressed with 7Z. I have protected each with good 10 character passwords consisting of upper, and lower cases, numbers and special characters. And I ...
5
votes
1answer
87 views

What is the impact of RSA key's size on CPU load?

I use ssh connection encrypted and compressed. If I use small RSA keys or very big RSA keys, what is impact on CPU load for compression, for decompression and on bandwidth (encrypted file size) ?
5
votes
1answer
193 views

Is email encryption, as claimed by ProtonMail, possible?

Is it possible to create a Web service that encrypts all messages, such that only the writer, and the person to whom the mail is sent, can read it? In other words, is the theory behind ProtonMail ...
1
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5answers
92 views

Using Diffie-Hellman to verify SSL Certificate?

I am fairly new to encryption and I need some help. I have a problem that I'm trying to solve. My problem is the following: I have a Web Server and an (iOS) App that that communicate with each ...
16
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8answers
18k views

Which Instant Messaging services use or allow secure protocols, and what do those protocols cover?

We all know there's a myriad of Instant Messaging (IM) services out there. But, which of these services uses or permits protocols that actually secure your communications? For those that do, what ...
1
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1answer
75 views

Securing user's data against an attacker that may gain server root

I'm designing a web application that is going to handle very sensitive data, storing it on behalf of its users. A kind of online safe, if you will. A user's secure data should only be visible to her, ...
-1
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1answer
61 views

How is PKI used to encrypt an e-mail for multiple recipients?

My understanding is that when an e-mail is encrypted and sent to a recipient, the recipient's public key is used to encrypt the e-mail, and then only the recipient can decrypt it with their private ...
14
votes
3answers
855 views

start point into cryptography and encryption [closed]

Recently I am growing passion for security/encryption/cryptography. I follow some famous people in this domain on twitter and read articles over the web. However, this topic seems deep and every time ...
2
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1answer
37 views

What security layers of protection are available over XMPP?

I have been working on an application running over XMPP. I would like to know which all popular security layers are available over the XMPP protocol, similar to SSL over http.
29
votes
3answers
26k views

Is 7-Zip's AES encryption just as secure as TrueCrypt's version?

The main difference being TrueCrypt creates containers and 7-Zip encrypts the file itself, so file sizes can be guessed. Now let's just talk about the strength and breakability of the encryption. ...
0
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2answers
56 views

Key Management/storage system

In my firm we have a couple of thousand hardware devices, installed externally, that all send back data to a central server. They send back data about every hour. Each of these hardware devices ...
0
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2answers
138 views

Steps to create user authentication system between mobile and server

First time doing a secure login from a mobile app to a server (built in java). I want to understand if I got this right. Login in for the first time: 1. On the mobile device hardcode a security ...
0
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1answer
45 views

Indexing encrypted data for efficient searching

I have implemented encryption for certain columns in a database. In some cases it may be necessary to search by these columns, either for exact matches or for substrings. At the moment, there is less ...
1
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1answer
84 views

What are methods to protecting an android phone from law enforcement

From what I hear, android uses the standard linux dm-crypt for encryption. Obviously you should have: A pin/password for your phone That pin/password should at least be 8 characters The question ...
0
votes
2answers
121 views

How do security agencies share their data with each other? [closed]

I am trying to develop an application for some hypothetical security agencies for sharing their data with each other for a college project.I have three questions, 1.How do security agencies share ...
-1
votes
1answer
101 views

How secure are encrypted USB sticks really? [closed]

So I have read some articles (this being one https://nakedsecurity.sophos.com/2010/01/05/flash-drive-manufacturers-warn-hackers-decrypt-secure-usb-sticks/) that point out some flaws with certain ...
0
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1answer
78 views

Publicly Available API + Sensitive ID/Key Transmission Over HTTP

I've run into a predicament... I'm developing a mobile application that utilizes a server for various things. One portion is that it stores an id/key pair related to accessing and processing ...
1
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1answer
43 views

LUKs Header Backup Security

It seems that one of the weak points in LUKs encryption is that the LUKs header can be a single point of failure if you do not create a backup header for it. My question is: What methods of securing ...
8
votes
6answers
903 views

Is it useful to protect hashed password with encryption?

Imagine that I am hashing the users' passwords with a random, long enough, salt, using key stretching, and a secure hash. Would it be more secure to finally encrypt the hash with a symmetric key?
2
votes
2answers
245 views

PGP as method of sharing AES key?

Would PGP work as a method of sharing the AES key, as shown below, and what would be the flaws with this method of encryption? Server sends PGP public key Client generates (uses as AES key for ...