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 to determine what type of encryption has been used? [duplicate]

i play an android game which seems to send the player's high score in an encrypted format . some thing like (f11cca35236eebbdc26a0ce45876d117) a 32 character code tried MD5 but no result found. i ...
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1answer
826 views

Are there other ways to encrypt files other then TrueCrypt and BitLocker [closed]

I don't trust BitLocker. Probably backdoored and relies on TPM which can be hacked according to DEFON. It also does not allow for hidden partitions or other advantages like TrueCrypt. With TrueCrypt ...
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4answers
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Why should one not use the same asymmetric key for encryption as they do for signing?

In an answer to a question about RSA and PGP, PulpSpy noted this: It is possible to generate an RSA key pair using GPG (for both encryption and signing -- you should not use the same key for ...
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3answers
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What does these warnings mean on an SSL connection by firefox (only)

I am connecting to a secure site and firefox mentions about identity: Owner: This website does not supply ownership information Verified by: Not specified Technical Details: Connection ...
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1answer
215 views

How to handle private key encryption/decryption for web application

In the process of designing a web app that handles public/private key pairs - a Bitcoin web app, specifically - I've had a lot of thought on how to securely handle the storage of the private key, ...
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2answers
55 views

Secure process threads

I was pondering my computer theory and this question has been bugging me for a while . Is it possible in some way to have a running process with its memory "encrypted" on an insecure system ? If ...
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85 views

Cisco/Juniper IOS hacking?

I am a University student and i'm currently working on a paper of ethical hacking. I have already investigated a lot about Web based attacks(SQLI,XSS,...) and about two months ago I started learning ...
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9answers
4k views

What is the best way of securing a website logon without SSL or preshared keys?

Today I sniffed some unencrypted wlan traffic during class and I found quite a few passwords by a simple search for "pass" and "user" in wireshark. Turns out about half the sites we use for school ...
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1answer
61 views

How to secure an embedded linux image

I'm building an image with openwrt sdk and i want to secure my image (by encrypting filesystem for example).. How can i do that to prevent anyone from seeing my sscripts or programs running ?
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1answer
78 views

Car Remote App Security

Car manufactures like BMW, Audi or Mercedes-Benz all provide mobile applications to control your car. All apps share really critical functions like remote lock/unlock or the ability to find your car ...
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11answers
4k views

Definitely safest password storage scheme?

I already asked this on StackOverflow but I was suggested this would be a better suited place and I found no way to "move" the question so I have to copy it. Believe, I know, there are hundreds ...
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1answer
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Is all data sent over SSH encrypted?

When you are connected to another computer over SSH, is all data transferred between the two computers encrypted? Or is any data sent in plaintext or any other "easy to intercept" format?
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5answers
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Whenever an unhandled exception somehow makes it into production, is it safe, viable, etc. to print an encrypted stack trace to the end user?

Whenever an unhandled exception makes it into production somehow - whatever the reason - there's generally an option (especially with .NET programs) to print out a stack trace to the end user before ...
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0answers
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encryption for short messages [closed]

Are there any algorithms/modes that work particularly well for shorter messages? (hundreds of bytes at most, usually < 100 bytes). I am looking at it from both security and performance point of ...
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6answers
6k 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 ...
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4answers
1k views

Security of the KWallet password encrypting application?

According to http://gaganpreet.in/blog/2013/07/24/kwallet-security-analysis/ , the KWallet password management system is quite weak, it uses key splitting, Blowfish 56, and no salt. The key ...
2
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2answers
111 views

Does having multiple nearly identical copies of an encrypted file make it easier to decrypt?

I store my passwords in an encrypted database file in the cloud. That is, my KDBX files from KeePass are stored in a cloud storage server, let's say it's Dropbox. Dropbox, whether they admit it or ...
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2answers
94 views

How secure would this method be considered for password storage

Ok I am currently storing the passwords in most secure way I could think of. With use of Encryption and Hash. The passwords are first generated by user as plain-text with minimum length of 6 ...
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3answers
4k views

How secure is Intel SSD Encryption?

Are there any known flaws in the full disk encryption on Intel 520 series SSD drives? Specifically, it seems these drives generate an internal AES key automatically, even when no password is set. But ...
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3answers
136 views

Encryption and Layers understanding

If I'm right the SSL encryption take place in the application layer, but we can also have encryption in the Internet Layer. Why are we using both, and why sites that doesn't have SSL are considered ...
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1answer
83 views

Which default encryption does openSSL use?

If I create a private key via: openssl req -x509 -newkey rsa:2048 -out cert.crt then openssl writes the private key to the file privkey.pem and if you do not provide the "-nodes" command it will ...
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2answers
92 views

How to compare encrypted private keys?

Is it possible to compare encrypted private keys if you do not have the passphrase? E.g.: openssl genrsa -out unencryptedprivkey.pem 2048 openssl rsa -in unencryptedprivkey.pem -aes128 -out ...
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1answer
399 views

Is 'Forge' Javascript crypto library secure? [closed]

I need a client-side crypto library. I've seen https://github.com/digitalbazaar/forge linked many times on stackexchange. Forge seems to be the most complete and well-documented crypto library for JS. ...
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0answers
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Managing keyczar keysets across multiple servers (google compute engine)

I'm a developer building a web service that will be required to store a few credentials for 3rd party services that would themselves provide access to customer data that I would consider sensitive. ...
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1answer
91 views

Serpent cipher technical details in-depth [closed]

Would anyone be so kind so as to describe to me the Serpent-256 cipher? How does it work and how secure is it compared to AES? I have searched everywhere and found scarse info about it. Anything ...
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1answer
246 views

An attacker got a few 128bit TrueCrypt keys from a RAM analysis. What can he do?

I'm trying to simulate a possible attack scenario for my studies. I've got a image, which has a encrypted disk, encrypted by TrueCrypt (confirmed). TrueCrypt is installed on the image itself too. ...
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1answer
224 views

Safety of TrueCrypt hidden volumes

According to the documentation a hidden volume stays hidden because it appears as free space. In TrueCrypt free space always has random data in it, however in the case of a hidden volume it's not ...
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2answers
413 views

What is the purpose of the entropy parameter for DPAPI.Protect?

So in Windows, when you make a call to the Data Protection API, you can specify some bytes as "entropy". To me, this sounds like salt. In PBKDF2, the salt is can, and in fact needs to be stored as ...
2
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1answer
156 views

HIPAA compliant blob storage architecture

There is a task to design a system to store sensitive data securely (should be HIPAA compliant in the future). It's just a draft - this will not be used in production in a foreseeable future. I have a ...
2
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3answers
117 views

Securing data on a server

I have a server which has 'loose' physical security (somewhat easy for the entire server to get stolen). For the sake of the question, let's assume that anyone can access the server physically, what ...
2
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1answer
89 views

Stream/Block encryption using XOR and Hash function?

Could a hash function like sha1 or ripemd-160 be used for secure key generation in a stream/block cipher? Obviously a repeated key like "abc123abc123abc123" would be bad, and a one time key pad would ...
2
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3answers
331 views

Encrypting Backups on Linux

I'm working on an automated backup solution to protect my files on my Linux servers. However, I'm not sure about how to securely encrypt the resulting archives. I am using 64bit linux, and I am ...
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1answer
41 views

Knowing Input&Output, How to determine encode method and the passkey that was used in encoding?

I've looked on this site and on SE. but I couldn't get a handle on this. Is there a way to find what type of encoding (and/or encode key) is being used? For example, I am testing a web ...
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1answer
143 views

Clarification on Digital Certificates

I used the makecert tool to create: self-signed certificate client certificate These are the commands I used: makecert -n "CN=MatthewCA" -r -sv MatthewCA.pvk MatthewCA.cer **for self signed ...
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1answer
109 views

How secure is Vigenere cipher for random data?

Traditional situation It is easy to crack a ciphertext encrypted by Vigenere cipher, if you know the plaintext is in a natural language like English. There are two methods to discover the key used to ...
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2answers
157 views

I need two separate hidden volumes in disk encryption. What are my options? [closed]

C: for system (Windows) D: for my files Makes much more sense to me than packing everything on the same volume, right? Is there a disk encryption utility capable of doing this? I don't know much ...
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433 views

Decrypt “key” that is encrypted with LMK or TMK

New to HSM (Thales payshield 9000), I'm working on DUKPT algorithm. I manage to derive the IPEK(encrypted either under LMK or TMK), but I need to inject a plain text IPEK into an end point device. I ...
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2answers
99 views

Encrypt and Authenticate localhost-traffic?

I have some app-components on the same machine but in different languages which need to communicate. I am using socket communication over localhost to do so. The data transferred is confidential. ...
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1answer
101 views

How do I determine the algorithm used on an encrypted string? [duplicate]

I have a Microsoft Access database which contains encrypted data: When I copy-paste it, it looks like $ 8F). How can I determine the used encryption algorithm? How can I convert this to readable ...
2
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1answer
93 views

Old hardware for encryption and backdoor free

I've read and seen articles on backdoors in the processors or at least the idea of that would render software based encryption worthless. I do know that routers and lots of the newer devices all have ...
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3answers
164 views

Is breaking a looping one-time pad practical? If so, how?

A one-time pad is known to be theoritcally secure, nothing can break it. However, if the key is reused, the one time pad becomes theoritically breakable. But even RSA is theorically breakable yet ...
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0answers
215 views

Share and store RSA - public key in java server and vice versa

My requirements are: Requirement 1: Share public key to java server. Steps: Generate public-private keys in iOS app. Store the generated keys in keychain. Send generated public key to java server. ...
3
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5answers
242 views

How does one know when a message is successfully decrypted? [duplicate]

How do people who decrypt encrypted messages know they have decrypted to the correct message? Do they just keep decrypting until the message is in English (or any other language), or is there a ...
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3answers
1k views

will google detects tor browser?

Usually while we browse Google through our i.p we will be redirected to respective countries,i normally use tor browser for anonymity,today while i browse google i got redirected to ...
0
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1answer
117 views

Secure distributed storing and querying of [medical] data?

Comparing ways of distributing and securely storing and querying structured and schemaless data. Currently I am using MongoDB, but am looking into (Postgres|MySQL)&CryptDB, Cassandra and others. ...
6
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3answers
482 views

What can a web application developer do to protect user information from powerful adversaries like the NSA or China

Some well funded intelligence services with potentially untrustworthy employees intercept and store encrypted data for years, in hopes of cracking it with future technology. What can I do to make this ...
0
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2answers
101 views

Asymmetric Data Storage+ No-Hash Password Storage?

Edit: removed a part of the original question; I'll break it down in a different post. I am following @Polynomial's answer to store information in a database. Here are my requirements: Only the ...
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0answers
41 views

Passing Encryption Key Across Session for Symmetrically-Encrypted DB

I'm building a database that symmetrically encrypts user data. Nothing super sensitive, I'd use a third-party if it was. The data is encrypted with a surrogate key; the user must enter a password to ...
6
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2answers
2k views

Why do PGP master keys only have a single subkey, and tie certification with signing by default?

After learning more about PGP subkeys and how to split apart the roles of (S)igning, (E)ncryption, (A)uthentication and (C)ertification, I discovered that in most cases(?) a default master key has a ...
0
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2answers
86 views

Ubuntu LVM LUKS Encryption

I've been reading about Ubuntu LVM Encryption, and I understand that it supports the use of Linux Unified Key Setup (LUKS) during installation, which is a block level encryption that encrypts the ...