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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1answer
489 views

Protecting decryption key on server

What is the most suitable way to encrypt and decrypt sensitive data on a public cloud server disk without storing the decryption key on the server in plaintext? REQUIREMENTS In our SaaS web/mobile ...
4
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0answers
16 views

What are the strenghts and weaknesses of Whirlpool Hashing Algorithm

I want to find out if the Whirlpool hashing algorithm have any weaknesses. There are quite a bit of articles explaining the strengths of this algorithm, but for some reason I cannot find any on its ...
0
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0answers
44 views

Cellular encryption algorithms currently in use globally

I have been doing research on the available encryption algorithms used by commercial mobile providers worldwide, and would like to know if the following list is complete: A5/1: the "original" ...
2
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2answers
135 views

Is it possible to do Public Private Key Encryption on a chip (hardware)?

Does a chip exist which will take input data and output encrypted data in a public private key scheme, where the public key is on the chip and the private key is located remotely? The ultimate goal ...
0
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1answer
176 views

Are there any alternatives to EFS for transparently encrypting the contents of a folder in Windows?

EFS is not an option for me because I'm using Windows 7 Home Premium. I am looking for folder encryption, not drive encryption.
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5answers
2k views

Why is being able to login with capslock bad?

I recently discovered a service where the password was not case sensitive. I understand basic principles of encryption and hashing so I am a bit worried, is this service storing my password in plain ...
2
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2answers
103 views

MD5 brute force on a faulty hash?

MD5 for passwords is considered insecure due to the ability to brute force and pick up the result. But what if I change some characters of an MD5 hash and I keep a record of that change so that ...
-1
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1answer
27 views

Unknown encrypted hash [on hold]

Does anyone know what kind of algorithm was used to encrypt these 2 strings? iKyJRiOfJcFUGP9n1OrC1Q== DdgItpIgpYw= Is there any way to decrypt them?
43
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2answers
28k views

How secure is Ubuntu's default full-disk encryption?

How secure is the encryption offered by ubuntu (using the disk utility)? What algorithm is used underneath it? If someone could at least provide a link to some documentation or article regarding that ...
1
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1answer
91 views

Am I encrypting and storing an array of user-details correctly?

I came up with a user-details-storing procedure that was, in the beginning, based on actual security-literature – but then I just kept writing without really doing all the cross-checking I should have ...
5
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2answers
886 views

Is XML encryption actually broken?

I recently stumbled on this post: XML Encryption Broken, Need To Fix W3C Standard I was expecting to find lots of information online about it, but there isn't actually all that much detail. Since I'm ...
0
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0answers
57 views

Is TrueCrpyt still safe, or is VeraCrypt the better option now? [duplicate]

I know that TrueCrpyt stopped updating a while back and it has a warning saying that it may not be safe due to unpatched security issues. I have a version of windows with Bitlocker, but the fact that ...
3
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2answers
1k views

What are the security implications of the POLi Internet Payments technique?

POLi Payments is an Australian based online payment provider which has begun trading in New Zealand. They are supported as a payment option on some large eCommerce websites in New Zealand, including ...
2
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1answer
43 views

Does the server certificate control the cipher suites available to secure the communications?

If a CA signs a certificate with a SHA1 signature hash algorithm, does that mean a client would be unable to communicate with the server if TLS 1.0 and below is disabled? I think what I'm asking is ...
0
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2answers
355 views

What current algorithms are considered (un)secure? [on hold]

With the new release of Windows 10, Microsoft has given .NET, Javascript and C++ developers a whole new bunch of options for cryptographic algorithms. Where as the old .NET code only allowed AES and ...
0
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0answers
31 views

Vecracrypt Outer Layer shows incorrect free space thus giving away the hidden layer? [on hold]

I just tried the veracrypt hidden volume for fun today, I was interested in how it works. I used the encryption on an old 2TB HDD, copied some files on the outer layer and then mounted both volumes. ...
0
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2answers
146 views

PCI Compliance - Encrypted Mobile Apps

My company (health care) went through a PCI audit and needs to solve some major issues. Our branches collect CHD on paper and saves them to a network drive as a pdf that our corp office accesses to ...
3
votes
2answers
118 views

Encrypt part of users' data in web application vs. password recovery

I'm developing a web-application that stores sensitive user data. Although the data is sensitive we want it stored permanently because the users might want to come back later and reuse it. The user ...
0
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0answers
83 views

CryptWall virus attack [on hold]

Is there something new about any solution to decrypt all my files that are infected with the CryptWall virus? All my files have extension *.abc.
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3answers
127 views

securely storing passwords that can be retrieved

I'm trying to build a web application that can store passwords of other services like Facebook, Gmail ...etc. These passwords can be later retrieved and shown to the user. This has to be a web ...
5
votes
2answers
692 views

How is ZixCorp able to provide email encryption without a password?

I am trying to understand how/if an email I received is being encrypted. A financial institution sent me a verifiable email (i.e. not phising) asking me to fill out a pdf form to complete a ...
4
votes
2answers
171 views

Difference between fully homomorphic and semi-homomorphic encryption

What is the difference between fully homomorphic and semi-homomorphic encryption?
3
votes
1answer
162 views

Would it be possible to add additional files to a password protected zip 2.0 file

I don't have the ability to determine/recover the master password for a production system that uses zip 2 archives. However, I need to be able to add new files to existing encrypted archives. There ...
1
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1answer
980 views

Improving stateless REST API authentication token - or ditch it for database persistence?

I'm looking to implement stateless REST authentication into an API. I've been reading up on articles here, and have implemented an idea that works, but I was hoping to get some feedback on its ...
0
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0answers
37 views

End to end encrypted calendar [closed]

What end-to-end encryption options exist for calendars? I am looking for a way to efficiently encrypt and store calendar entries myself (so not relying on Google calendar etc). For email there is for ...
4
votes
2answers
62 views

Understanding Digital Certification as as a whole starting from a normal http request

I am very new to security and i do not come from an IT background. Please pardon me if i ask some very simple and questions that don't make sense. I am trying to understand the difference between ...
4
votes
1answer
78 views

Is encrypted data a good random source?

Given that someone needs my encryption key to predict the output, can I encrypt arbitrary data (zeroes, system logs, personal photos) with AES and a secure passphrase, and use the result as a ...
1
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1answer
66 views

Secure connection between two clients with shared secret

I am creating a system where there are multiple clients, each of which has a secure connection to a central server which could pass out shared secrets to each of them. I could be wrong, but I am ...
4
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1answer
81 views

How can I demonstrate that 3 independent root CAs validated my domain?

I am concerned about the hacking of a root CA and want to buy 3 SSL certs from completely different providers who will independently validate my identity. Then at presentation time, I will send all 3 ...
2
votes
2answers
74 views

SSL stripping in home network

I am trying to monitor the traffic of some "smart devices" in my home (TV, coffee machine, ...) but most of them communicate over SSL. What possibilities are there to look into SSL encrypted ...
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0answers
17 views

Is 3DES is a weak cipher? [duplicate]

Our application runs on JBoss 6 + jdk 1.7. We use the jdk provided SSL provider. The server.xml file contains SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA in the cipher lists. Is it a weak cipher? Should we ...
1
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1answer
136 views

Any way to revoke old key pair?

There is a many-year-old 1024 DSA key in the public keyservers under my name. There is a 2048 ELG-E subkey for it. I didn't create these keys, they were created for me by a former employer without my ...
0
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0answers
12 views

Proving an encrypted message contains (but does not 100% consist of) a plain-text message? [migrated]

I have keypair (u,r), and two pieces of data, X and Y. I reveal X publicly but keep Y secret. Y has high entropy. I then combine X and Y, into c(X,Y) = Z. I encrypt Z, into "encrypt(Z,u) = Q". r ...
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0answers
38 views

Is it possible to create multiple hidden volumes within an encrypted volume? [migrated]

You can create an encrypted hidden volume from an outer encrypted volume within Truecrypt or it's fork, Veracrypt... but is it possible to create more than one hidden volume within an outer encrypted ...
0
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1answer
53 views

Should I make my api calls to update users contain a password or hashed auth key?

So Im creating an API for an app that in the backend involves updating users, deleting users, and some other user related stuff. Im using the slim framework and I was wondering when the user wants to ...
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0answers
75 views

PHP crypted or hashed string to decode

I have a problem for captcha solve in 3 days. This is crypted or hashed captcha cookie 55debbcf069c81440660431 23 characters long. I found last 10 character is 1440660431 timestamp. I think first 13 ...
5
votes
2answers
3k views

Protect access to an SD card

How can I protect access to an SD card, so that only authorized users can read or modify the content of the SD card. Currently everybody who has physical access to the SD card can read or modify ...
0
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1answer
99 views

Default Encryption - A Panacea or Placebo

I wrote this on LinkedIn - Discrete Discretion My first question is: Is it accurate to say that default encryption is a placebo? Will default encryption only make end-users think they are secure ...
3
votes
1answer
92 views

Exchange encrypted messages on public chatroom

Not so long ago, I was chatting with a friend on our university's accounts, and the discussion went to an interesting subject: what if the administrators have access to our messages? So we had the ...
7
votes
5answers
5k views

If I send a fax from an unsecure endpoint to a secure endpoint, is the data secure?

I am very technical, but I do not know much about fax. I was told to send a fax to somebody with some very private information, and not to worry because they had a secure fax line. That's all well ...
4
votes
2answers
87 views

Is encryption possible for simplex (one-directional) TCP/IP, and if so, how?

As explained in the TCP/IP Guide, it is possible to configure TCP/IP to operate in simplex mode and this mode is utilized, among other things, in communication from satellites. One consideration with ...
0
votes
1answer
77 views

“If encryption has not been implemented, a comparable alternative has been implemented” [closed]

What constitutes as a comparable alternative to encryption? I know that password keepers and other services are not comparable and are not considered encryption. If the context is authorized access ...
0
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1answer
41 views

Locking down Amazon RDS table data

We are using MySQL Amazon RDS. The instance is encrypted, and also only available via SSH from the production server EC2 instance. One of the things we are trying to do is give access to some ...
1
vote
1answer
73 views

What will happen to decrypt a tampered message encrypted by a symmetric key

There is a message M, it's encrypted by a symmetric key like Y=E(K,M). The message is sent to B from A. During the transportation of message M, if the message is tampered by C, then when B received ...
5
votes
3answers
1k views

Digital Signature and Verification?

AFAIK , When Alice wants to write a message to Bob -- she uses Bob's public key and encrypt the message - and then Bob - using his private key - use to decrypt it. So public key is used to decrypt ...
1
vote
1answer
27 views

Envelope Encryption with asymmetric keys vs KMS

In Envelope encryption a symmetric secret key is used to sign the data and then another key is used to encrypt the secret to produce an encrypted secret key. The encrypted messages is packaged with ...
5
votes
2answers
3k views

Android support for TLS 1.1

Do anybody know from what version of Android did TLS 1.1 started to be supported directly by the OpenSSL version preinstalled in the system?
5
votes
4answers
35k views

How safe is the 256-bit encryption used in bank transactions?

Most of the banks use a 128-bit or 256-bit encryption. What does this mean? Does it mean that the keys used in SSL are 128-bit long or what? If they are the SSL key lengths then 128 bit RSA keys are ...
2
votes
1answer
80 views

GPG: Can't encrypt DSA 3072 keys

I would like to ask this question as I'm not the first person which has this behavior. I'm trying to encrypt a simple message using GnuPG using a public key I've received from a friend, he's using ...
3
votes
1answer
124 views

Writing your own John the Ripper module

I have a script in C, which is able to determine the password of certain data. It uses HMAC and RC4 algorithms to encrypt the given password and then compares that later to the given data. If they ...