Cryptography Why are perfect squares used so much in cryptography? (Particularly the size of the key in bits)

Why are perfect squares used so much in cryptography? (Particularly the size of the key in bits)
Advice on an old encrypted partition
Cracking Linear Congruential Generated list
Paranoid about having FDE with ever-growing anti privacy laws (lost password)
Encrypted Files

Why are perfect squares used so much in cryptography? (Particularly the size of the key in bits)

Posted: 02 Apr 2019 01:09 PM PDT

submitted by /u/QuantumFall
[link] [comments]

Posted: 02 Apr 2019 03:34 PM PDT

I have an old USB HDD and I think one of its partitions is a Truecrypt encrypted FAT32 partition. I tried mounting it on my Mac with Veracrypt and I either don't remember the password or am doing something wrong or maybe there's nothing there it has been some years, I really don't know. Fdisk on linux shows it as a type W95 FAT32 (LBA). Windows I tried running Truecrack but I don't see a way to with a whole partition, just files. I think Windows is giving it a drive letter but shows 0 bytes.
From searching around, I think I can use dd to copy the beginning of the drive to a file and run truecrypt on that (pretty sure my password is bad and I have some combinations of things to try that I would've probably used at that time). But I'm not sure of the procedure for it.
So, really just looking for any advice here. Mainly how to figure out what I did on this partition, whether it's just got some corruption or if it's encrypted. Is there a way I can manually look through the data to see if there is some plain text so I can tell it's just broken? Any instruction or verification if it's possible to brute force the partition?

OK thanks!

submitted by /u/downtownpartytime
[link] [comments]

Cracking Linear Congruential Generated list

Posted: 02 Apr 2019 10:37 PM PDT

I have a LCG that is (n+1 = (a * n + b) % c) and generated hex values using this, but now I want to know the value of all a,b & c and the next values. How I can do that in python?

Here are the generated values:

'004e' '6501' 'e11e' 'b731' '2bee' 'ff61' '20be' 'fd91' 'ff8e' '71c1' '085e' '1bf1' '7b2e' 'bc21' '97fe' '1251' '9ece' 'de81' 'cf9e' 'e0b1' '6a6e' 'd8e1' 'af3e' '8711' 'de0e' 'ab41' '36de' '0571' 'f9ae' '55a1' '667e' '5bd1' 'bd4e' 'd801' '3e1e' '8a31' '28ee' '3261' 'bdbe' '9091' '3c8e' '64c1' 'e55e' '6ef1' 'f82e' '6f21' 'b4fe' '2551' '5bce' '5181' '2c9e' 'b3b1' '676e' '0be1' '4c3e' '1a11' '1b0e' '9e41' '13de' '5871' '76ae' '08a1' '837e' '6ed1' '7a4e' '4b01' '9b1e' '5d31' '25ee' '6561' '5abe' '2391' '798e'

submitted by /u/sajaljain_syd
[link] [comments]

Paranoid about having FDE with ever-growing anti privacy laws (lost password)

Posted: 02 Apr 2019 06:12 PM PDT

I have some FDE disks which I don't even have the password for anymore because I lost them. I was wondering what would happen if for some reason I was forced to unencrypt those drives by authorities and I told the truth (that I don't remember the passwords). Probably nothing good as they would interpret this as not cooperating with authorities. Im not US based but the laws are becoming worse and worse and losing your pass seems like one way ticket to jail. I think we have lost... there's no space for privacy anymore. If you have any problems with authorities (for instance tax problems) and you lose access to FDE disk it doesn't look good from what I can tell. I left them there because im too lazy to format them and in hopes I would some day remember the passwords. Should I just delete them and give up on FDE due inherent risk of it? You always think you will never be under investigation until one day you make a mistake on your taxes then visit of cops followed by "reveal password pls" is not something im looking forward to. Apparently a guy that made a million on bitcoin got a visit by the cops even after paying his taxes and I was wondering how it would have went for him if he had FDE disks that he couldn't reveal due lost passwords. I just think that the risk is not worth it with the laws that are in place or up and coming. At the same time without FDE trying to hide anything important is pointless since operating systems always leave temporal files around, I wouldn't even trust linux. I just think im done with encryption at all, you never know when you will have some problem were you are forced to decrypt, from the state to thieves. Imagine the $5 wrench attack when you don't even have the god damn password and they wouldn't believe it... you get beaten into a bloody mess by some robbers because they are brutes that wouldn't believe you lost the password, or you get put into prison by state because you dont know the password. These things are possible to happen and keep me up at night. I think its not worth it and I will run secure erase on these disks and be done with it and don't do FDE in the future. I dont really have anything to hide. It still sucks tho because encryption always seemed something cool to me, however what's the point anymore. I would like to know what your view is on this.

submitted by /u/AcuteDuckpin
[link] [comments]

Encrypted Files

Posted: 02 Apr 2019 11:54 AM PDT

Anyone can help decrypting these files?Or at least teach me how to decrypt it?Thank you. http://www.mediafire.com/file/44zks3rc7by3n7j/to.zip/file http://www.mediafire.com/file/h7o54nw01xr3bb6/suef.zip/file

submitted by /u/ki1ra4
[link] [comments]