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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4answers
466 views

Strategies to store/remember very long password?

If future proof encryption is - in theory - possible it will require long password. What are some of the strategies for storing or remembering very long - in this case rarely used - password? For ...
6
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1answer
2k views

Is there cryptographic material in a phone's SIM card that can be used with RSA encryption?

Given that a smart card stores a private key that can't be extracted, it appears that a SIM card is similar to a smart card in these respects. I need to store (or use an existing) private key on a ...
9
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3answers
17k views

Encrypt data within mobile app and send to web service

I'm developing a mobile application for Android and iOs. What is best practice when it comes to data encryption within the mobile application which will be sent to a web service? Basically I will ...
3
votes
3answers
193 views

Is it safe to mix authentication methods?

Is it a good idea to "combine" authentication methods? Example we can use username/password method to authenticate a user from a server. What if we used this as a first authentication step to get ...
6
votes
1answer
4k views

Android / CyanogenMod encryption vs GNU/Linux

Hi I am trying to understand how encrypting an Android based phone works compared to a GNU/Linux host which relies on LUKS dm-crypt. Here is what I understand: Encrypted LVM on GNU/Linux is an ...
1
vote
1answer
407 views

AES encrypt secret key with plaintext

We need to be able to retrieve password. Hashing is one-way, we can't do that. So we ended up using AES. We want to know if the following schema is safe or not. I am only familiar with modulo PK ...
6
votes
2answers
1k views

Is it reasonable to prevent timing attacks by using fixed processing time

I have systems that perform cryptographic operations within a SSL/TLS tunnel. My concern is that I may leak timing information when encrypting, decrypting, or hashing. Part 1 Is it a good idea to ...
13
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2answers
15k views

Is it possible to use S/MIME in the web client of Gmail?

I could not find any options in the web interface of Gmail. All I could find was a Firefox plugin to use S/MIME with Gmail, but it seems to be outdated.
8
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3answers
999 views

How practical/important is the Lucky Thirteen TLS attack?

I was reading this article which talks about a new attack against TLS being called Lucky Thirteen. It claims to allow repeatable MitM attacks against HTTPS connections. It's described as being fairly ...
0
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1answer
123 views

Auto encrypt chunks of content for backup, best practice?

I'm just curious and it's more like a mind game, I'm not into cryptography. How would one encrypt data that's constantly generated? Put the data automaticly into chunks encrypt the chunk and send it ...
1
vote
2answers
170 views

Need a time consuming symmetric encryption

I have a database with millions of entries, each entry encrypted with a (different) password. Normally, only one entry is needed at a time. If somebody steals the database, I want to make it hard for ...
3
votes
2answers
446 views

Securing Time Sensitive Data

I have a number of time sensitive, embargoed pieces of information that I need to distribute over the Internet and have received at a precise time. I'm currently dealing with the problem by uploading ...
5
votes
5answers
244 views

How to avoid to lose data encrypted because it was encrypted by no longer supported software?

How can I avoid losing data that is encrypted using methods that may become obsolete? I have valuable family records I wish to secure, so I plan to encrypt them before putting them in long-term ...
2
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1answer
357 views

Credit card data - sharing and storage [duplicate]

What is the industry standard for sharing credit card data between client (thin & thick) and server?
2
votes
0answers
239 views

Utility to hide several encrypted messages in single file [closed]

I am interested, are there existing utilities/projects under way devoted to combining encryption and steganography. I would like to - combine two or more messages, encrypted with separate ...
6
votes
5answers
2k views

Does a binary executable have to have some critical plain-text components?

When companies package binary executables, they are often encrypted, compressed, scrambled, and otherwise made so that your lazy hacker can't simply open the program up in Notepad++ and see the code. ...
2
votes
2answers
270 views

Slow down symetric encryption

I'm developing a program in Java. In one step data should be encrypted and exported in a file. As of now we are encrypting in AES-256 I want to slow down a possible brute force attack as much as ...
4
votes
1answer
377 views

Saved passwords (use case)

I have a program in which a user enters a password, and the user data is stored encrypted using AES-128. The data and passwords must be stored together. Both the data and the password are encrypted ...
-6
votes
1answer
585 views

Secure Web application Password vault/manager [duplicate]

I would like to build an open source online password vault which allows users to securely store their passwords, like Keepass or roboform, but where a user can access their passwords through a ...
4
votes
3answers
995 views

Determine hashing algorithm only with known input and output

Given the input: test A system generates the following output hash: 0x001F41B6A0534D3B851D69EFE6237F550100000010D5F4FC65E64BCFDBF2590212E4411C44942C6C734C00ACFE13B958DCAB3614 I do not know ...
4
votes
3answers
935 views

How to secure a truecrypt container allowing access with multiple SSH public keys?

I would like to create a TrueCrypt container which can be accessed by multiple people. The container itself can be stored anywhere, e.g. in a shared folder in Dropbox or Google Drive, ... I would ...
1
vote
1answer
2k views

Picking an encryption algorithm for auth tokens passed via AJAX

I'm looking for a low CPU intensive encryption algorithm, to pass around session authentication tokens. As an example: The user will login in to the website (via OAuth, whether by the site as ...
12
votes
1answer
2k views

How to study the packets sent by a keylogger

One of my friends runescape account got hacked through key-logger. He downloaded a runescape gold generator from a file sharing site and tried to use it. I have a strong doubt that it is a key-logger. ...
9
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3answers
3k views

Encrypting user data using password and forgot my password

I am planning to do a web application which stores a lot of personal stuff (info, photos...). And to give users a sense of protection, I want to encrypt the data before storing it to the database. ...
4
votes
1answer
2k views

How to make a secure key distribution scheme/protocol?

We are building a data processing platform on Amazon AWS. We are going to store sensitive data in the S3 (encrypted) and then the Amazon EC2 node is going to be utilized to process this data. We are ...
2
votes
1answer
2k views

How to secure or (Ensuring Integrity) of Web Data in transit and in store?

Consider (usual scenario) You own a Shopping Cart Website and hosted on Internet, now, your hosting company provides you database to store your data. If talking about security, we need it for: ...
8
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3answers
21k views

AES CBC padding when the message length is a multiple of the block size

Assuming that a 32-byte plaintext is encrypted by AES 128 CBC - is it mandatory to add 16-byte padding, according to the different padding schemes?
3
votes
4answers
970 views

Can an attacker reuse stolen SSL private key to recreate that domain on his server

Say my domain (https://example.com) SSL private key has been stolen and was not protected by a passphrase then. Can the attacker uses that key and certificate to host the same domain on different ...
0
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2answers
1k views

“Premium SSL” vs “Stanard SSL” certificates - Any reason why I would want a “Premium SSL”? [duplicate]

Possible Duplicate: What are the advantages of EV Certificate? besides the green URL bar and free security scan and whatnot. Our website does NOT accept any personal info other than email ...
4
votes
2answers
3k views

What are the differences between ssh generated keys(ssh-keygen) and OpenSSL keys (PEM)and what is more secure for ssh remote login?

I have learned there are 2 methods to make SSH remote login easier and secure , those are; ssh generated keys (using ssh-keygen)OpenSSH Keys PEM (.pem) keys usually generated with OpenSSL (Amazon ...
2
votes
2answers
151 views

Which hard disk encryptions schemes are tied to the original hardware?

When using a laptop, an encrypted HD/SSD can be an important security measure. However, laptops are prone to accidents (fluid spills, dropping on the floor, etc) that may mandate some or all of the ...
4
votes
2answers
1k views

How to correctly implement AES in a backup application

I am writing a back-up application which should have the feature of encrypting the back-up. It must encrypt file data, paths and filenames. The application is being written in C# (.NET). Target is ...
4
votes
3answers
449 views

Completely mimimise the possibility of my web hosting account being hacked

I've just moved web hosting providers and I want a fresh, secure start. To a certain extent, I don't mind what I have to do I'm just fed up my account being hacked or infected. I just wondered how to ...
4
votes
3answers
368 views

jasypt message integrity

I've been looking into ways to encrypt an authentication token that I need to pass from one site to another. Things i have learned so far are use a high level library. don't use ECB use a HMAC to ...
1
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3answers
528 views

RSS Feeds: restrict access

"We are a bunch of journalists and we share much of the information via e-mails. This has become tedious now. Hence we found out a way to share, by just having to share our private blog posts via ...
12
votes
2answers
14k 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 ...
3
votes
1answer
2k views

How to implement authenticated encryption using pycrypto or a python library?

I'm using pycrypto to encrypt files that will be stored in the cloud. I expect the user to enter a password to decrypt files, but encryption shouldn't require a password (to allow the script to be run ...
1
vote
6answers
2k views

Is SHA-1 encryption?

I have read that SHA-1 is a cryptographic hash function. On an exam, SHA-1 was given as a possible one-way encryption algorithm. Does SHA-1 require a key as input? Is a key required to qualify as ...
5
votes
1answer
3k views

Security of bcrypt/sha256 key used with AES to encrypt a file

I'm looking to encrypt files using secure hashing and encryption algorithms in Python. Having used bcrypt in the past, I decided to use it for my passphrase calculator, then pass the output through ...
1
vote
1answer
220 views

Need advice on Cryptography digital files project

I have to choose a topic for my end-of-year school project and I need some advice. I was thinking of implementing an online tutorial materials (digital files) project. I have been researching on ...
6
votes
1answer
16k views

How can I tell if a PPTP tunnel is secure?

PPTP has been demonstrated to be broken in many ways, and most installations are insecure. But it is also theoretically not broken if configured correctly. As an end-user, is there a simple way for ...
11
votes
4answers
13k views

How secure is the new Mega-site encryption?

The new Mega site, sucessor of Megaupload, claims that all information is encrypted with a symetric key that only the user has access. The general terms are listed here: All files stored on MEGA ...
3
votes
2answers
374 views

Is a random keyfile more secure than a derived key?

I'm devising an encryption layer for some proprietary cloud storage API. Basically this should act as a transparent adapter that encrypts whole binary blobs (files) on upload and decrypts them on ...
0
votes
1answer
251 views

Tracking information on HTTPS connection

My organization uses cyberoam firewall. They are monitoring all activities including my search text in Google, Wikipedia etc. So recently i changed to HTTPS versions and now using HTTPS connections of ...
0
votes
1answer
1k views

Is TLS secure when full eavesdropping on the network occurs? [duplicate]

Possible Duplicate: How is it possible that people observing an HTTPS connection being established wouldn’t know how to decrypt it? Alice connects to Bob's site via a TLS secured connection ...
-1
votes
1answer
132 views

GnuPG implementations are not cross-compatible? [closed]

Let's say I made my private key using Enigmail. Then I imported it into a Windows program called GPG4USB. When I want to decrypt a message it asks for my encryption password but it doesn't accept the ...
44
votes
5answers
50k 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. ...
7
votes
3answers
724 views

Is it a good idea to have a “master” password?

Though I do have a good memory of passwords, it is quite impossible to have one password per application. Yet, it should be... My current way to deal with passwords is to have five passwords and to ...
-3
votes
1answer
2k views

is there better email, file, disk encryption than PGP? [closed]

Currently, I am using Symantec's PGP desktop whole disk encryption for my Mac. After hearing that FileVault was insecure and supposedly easily crackaable. However, PGP has been around for a long ...
2
votes
2answers
921 views

How does Chat monitor work,if we use encrypted service like gtalk

i have heard that there are software like this http://formessengers.com/mdetect.htm that monitor Chats and can see the chat logs,but how do these kind of software work if we are using services like ...