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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2answers
106 views

I forgot my 7z password [closed]

I used 7zip to encrypt a 200mb archive of my code used a combination of some of 7 possible words and no numbers or caps. So 823543 possible passwords. What is the best free program I can use to ...
0
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2answers
60 views

encryption protection against lost password

Here is a plan I am thinking about. I haven't seen this proposed, so I thought I would ask about it. Threat we are guarding against: A lost or stolen laptop leading to exposure of sensitive ...
1
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1answer
82 views

Is DNS secure when using DNS crypt?

Is it the same security level like a VPN DNS wise when using Open DNS crypt servers plus DNS crypt proxy? I installed both packages in Ubuntu and now unless I have the right IP entry in the network ...
1
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1answer
40 views

Detect if AES and hmac keys are invalid

I have a server which has a configured value of AES and HMAC key. The client also should have the same keys. When the client sends a request, the server interprets this request and reads the message. ...
8
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6answers
2k views

Why do we keep our keys secret, rather than our algorithms? [duplicate]

On almost any website that relates information about cryptography in general there is this common notion that almost all encryption/decryption algorithms should use a key as one of their inputs. The ...
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1answer
46 views

Is it possible to make a different encryption for a phone communication?

I wanted to know if maybe it's possible to make a phone communication more secure than the current A5/1 (used for GSM). Or maybe create a special tunnel between two phones. I mean like an ssh ...
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1answer
79 views

Does Server Mistrust improve security? [closed]

By server mistrust, I mean the fully implemented lack of customer plaintext on a vendor's system, and lack of vendor access to customer plaintext. Specific case in question: Password and SSH key ...
0
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0answers
62 views

Ensure that a file can only be decrypted after a specific condition is not present

Are there any cryptographic schemes/protocols that would allow me to encrypt a file, make it publicly available, but ensure that it can only be decrypted when a specific condition is not present (I ...
2
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3answers
206 views

Is it possible to encrypt an SD card?

In the film "Citizen 4", it's said that we cannot encrypt an SD card. Do you know why it would not be possible?
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1answer
180 views

How can I recover my encrypted data from a Sandisk Secure Access [closed]

I had saved my all important and personal data on sandisk secure access 2.0 on 16gb pen drive cruzer but after 1.5 month when I connect my pen drive to the system, it asked me to generate new ...
1
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0answers
58 views

How to decrypt a file only if specific conditions are not met [closed]

I know how to decrypt a file after one or more specific environnemental conditions are met (with secure triggers). I am interested in a cryptographic sheme that would enable decryption of data only ...
0
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1answer
39 views

Passing data among 3 parties with public key encryption

There are three parties involved in a repeated data transfer process: Client C, Broker B and Provider P. There might be multiple clients C. Broker B manages P's customer database. Each customer has a ...
0
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0answers
89 views

Could other people steal my Internet connection if they had my PPPoE data?

Would it be possible for other people to use my PPPoE data to get Internet access or is it somehow restricted to my house? Then what about my neighbors downstairs, could they do it? And what about ...
0
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1answer
101 views

Is SQL Server 2016's Deterministic Encryption any good?

I'm seeing that MS just released a new version of SQL Server which supports deterministically encrypting a column, so that you can still query it: ...
1
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0answers
53 views

How can I use session salt for encrypting data using AES in CTR mode?

I have to implement a crypto-plugin in Java. The approach followed is conceptually similar to that used for SRTP. The algorithm used for data confidentiality is AES in CTR mode (I'm following a ...
0
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0answers
38 views

What type of security does Gazzang zNcrypt provide?

We have just planned to implement the same in our organization, and I believe this will encrypt files and data on disk. I have two questions: Does it provide column level encryption in database (if ...
1
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1answer
60 views

Can DUKPT BDK be 192 bits?

All examples seem to be with 128 bits. Can it be 192 bits?
1
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2answers
62 views

secure notebook options [closed]

How can I secure my notebook with highly sensitive information stored in a spreadsheet. I am keeping the following options in mind: Password protect & encrypt BIOS Full disk encryption Password ...
1
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1answer
89 views

Sketchy traffic from port 3030?

I am running tests on a server that is ran by a close family friend, who agreed to allow me to do so in exchange for the experience I will gather (I am currently a computer science student). On ...
0
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0answers
55 views

Hashed master password and generated encryption key in a password manager program

I'm writing a WPF password manager application to practice programming, so far this is the scheme I intend to use to store master password and individual site password: Master password: Generate a ...
2
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1answer
32 views

Does endianness affect encryption keys and initialization vectors?

When encrypting (specifically when using AES) content, will endianness affect how the key (and/or initialization vector) should look when encrypting/decrypting content? And could this depend on the ...
0
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1answer
298 views

Decrypting .P7M File with Key (.pem) using OpenSSL

My knownledge about security is limited so I need some help here. The Question I want to Decrypt a .P7M file using its private key (.pem). I would prefer to use OpenSSL for this. Tried so far ...
10
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2answers
371 views

Are there any meta-formats for crypto?

Are there are any (properly specified) meta-formats / schema formats for describing cryptographic message structures? I'm looking for a way to describe the format (where some channels might want ...
0
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0answers
119 views

Is facebook to facebook (mobile application call ) encrypted?

I understand facebook uses WebRtc to send voice data packet in network if any one end client is on the browser. Use of DTLS packets can be seen in captured (wireshark) file. But in case of mobile app ...
0
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1answer
63 views

Is SESSION is safe for transferring encrypted email and password in PHP

I am working on a project where I am using PHP_SESSION, Somewhere I heard that PHP_SESSION are quite unsafe for passing valuable data so I have to know what are the security flaws, how it can be ...
0
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1answer
97 views

iOS 8 encryption vs Android Lollipop encryption

iOS 8 includes encryption that is enabled by default, whereas in Android it is optional. Do both operating systems decrypt everything on boot and then the PIN is used to unlock it until it is turned ...
2
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1answer
176 views

How to tell if my OpenPGP public key is self-signed?

I recently read: You should sign your PGP public key immediately after generating your public/private key-pair. And now I wonder how I can check whether I already did that. So my question is: ...
2
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1answer
48 views

Best practice of deprecating old OpenPGP subkeys when migrating to a new subkey pair?

I've been using GnuPG with an offline master + online subkey setup for a while now. All my email is signed with the signing-only subkey and encryption is done with the encryption-only subkey. The ...
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1answer
113 views

What encryption is this? [closed]

7c4a8d09ca3762af61e59520943dc26494f8941b This is 123456, I don't know what kind of encryption it is and all the passwords are saving as it in my database so i need to know
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2answers
96 views

How is encryption broken [duplicate]

The title describes pretty well what I want to ask, because I just can't wrap my head around it. I understand the basics of breaking encrypted data with the method of kind-of-bruteforcing where you ...
3
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1answer
140 views

Why is plain dm-crypt only recommended for experts?

I am curious about the following claim from the Cryptsetup FAQ: 2.4 What is the difference between "plain" and LUKS format? First, unless you happen to understand the cryptographic background ...
0
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2answers
138 views

Can I VPN a phone's connection to my home network, and then apply my home firewall to my phones network connections?

I have a decent firewall/router at home, and I was wondering whether it would be possible to use my home firewall for the connections that my phone makes, even when I'm not at home. It would mean ...
2
votes
1answer
199 views

VoIP call security: How does encrypting signalling protocol (SIP) protects RTP?

Checking the data packets from many VoIP applications shows that SIP packets are encrypted with TLS. So the captured session shows no SIP signals at all, just simple TCP and TLS/SSL packets. But ...
0
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2answers
31 views

Advantages of Enabling Firmware Password Protection

What security advantages, if any, would be gained by enabling Firmware Password Protection on a mac that allready has filevault encryption for the disk?
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0answers
65 views

If someone hacks our server, how can we prevent them from decrypting data stored in Vault?

I have been tasked with evaluating Vault in our company and the first question asked by an architect was: If someone hacks our server, how can we prevent them from decrypting data stored in Vault? ...
0
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1answer
78 views

Server full disk encryption protection from malware

A group of LINUX servers is using dm-crypt to encrypt data. The servers do not store data long-term but are only temporary stopping points for data before it is sent to other systems. The time the ...
-1
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4answers
132 views

What mail applications use crypto?

I just read that everyone in the world can ready my mails (if intercepted in traffic by eavesdropping?). Also, it reads that current versions (book's from 2004 so I assume that new versions adopt ...
0
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4answers
351 views

Is end to end email encryption possible without unique domain/subdomain for each user?

Lets say Alice@gmail.com wants to send message to Bob@secureMail.com Alice <--> gmail.com <--> secureMail.com <--> Bob We know gmail.com can read the unencrypted message. Is it possible for ...
3
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2answers
302 views

RSA public key and private key lengths

I'm having a problem understanding the size of an RSA public key and its private key pair. I saw different key sizes for RSA algorithm (512, 1024,... for example), but is this the length of public ...
2
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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
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0answers
62 views

How to encrypt and authenticate large amounts of data with NaCl

In a current project the NaCl-library crypto_box function has been used to encode and crypto_box_open to authenticate and decode data. However the library does not seem to support de- / encoding of ...
3
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1answer
114 views

RC4 encryption of torrents safely

Torrent clients offer encryption of traffic using RC4, and people consider this very safe to hide traffic information from ISP. Now since I have a website with SSL encryption, I know that RC4 has a ...
1
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1answer
66 views

Security concerns of browser injected JS

To employ end-to-end encryption, I am using a small tool that encrypts contents that is then posted and stored on our servers. While there are several concerns on client based encryption, I think it ...
2
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2answers
114 views

Are hashes of hashes used for password storage in practice? Why/why not? [duplicate]

A naive developers might store a password in the database directly, which would then be compared directly with the password sent from a client. A more security conscious developer might instead store ...
3
votes
1answer
55 views

Is it safer to store valuable information on a unsecure client or send the data through the internet?

Background: I'm creating a secure web app with the purpose to act as a no-knowledge storage for small data (we're talking a few bytes). Since all the encryption and decryption happens client-side, ...
37
votes
9answers
5k views

Is full disk encryption on a server in a secure data center pointless?

I am having a debate with several people regarding how much protection full disk encryption provides. dm-crypt is being used to encrypt data which is required by my company to be encrypted at rest. ...
1
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0answers
54 views

What is the difference between XOR and poly-XOR? [closed]

What is the difference between XOR and poly-XOR in encryption?
14
votes
1answer
2k views

PayPal encrypted with obsolete cryptography

My Chrome just complained from PayPal's security, similarly to this issue: Google Chrome "Your connection to website is encrypted with obsolete cryptography" The identity is verified, but ...
3
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3answers
126 views

How do I deal with browsers complaining that my MediaWiki website has unsecure resources? [closed]

I recently bought a subscription to a NameCheap shared hosting plan, and I plan to primarily run MediaWiki on it. I've managed to setup everything fine except for the SSL encryption. When I visit my ...
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2answers
182 views

Cryptowall encryption files

This is a question concerning the way the Cryptowall ransomware encrypts files on the victim's computer. Someone knows if it is possible to recover the encryption key comparing the encrypted file and ...