Randomly chosen e-mail addresses recovered from Gravatars on the website stackoverflow.com

MD5 hashe-mail
d679c7540fc92a2c7eea11de33990953f*************4@yahoo.com
e7bfa9381654d4041d86ad2fe56c778cj**************1@gmail.com
3d6f0a1ee7b896e7d603d1911bf7dfe4r************3@gmail.com
73956f6972e0ec4b00558417b99fde59m************i@hotmail.com
16b345845b951435d9b8256d45c064f2l**********n@gmail.com
ec892d9cd94d8a187992105bd5173cbbv*****************a@hotmail.com
13cf4dba55db53bb6195bb1873fd604eb*************9@gmail.com
1ae844c737e9fc83cb7e1ff30f1d9b35m***************e@gmail.com
a9520af63f2c52fbefd0c618050f44e1d************s@plaidpony.com
f3ba24b452ce0920349ed0ef13a6186ah******h@yahoo.com
05d6d16e394742dec7eb0ada00a627d0a********4@gmail.com
6579873bc36c16b14dfac78e18270db6b******e@gmail.com
72fcb1922659b576b112fef1067f4befw********b@gmail.com
866bd5cf066ac2959a7d53c91ac68991e******o@gmail.com
9c6bb83e79e832b4f41dc2fe0fc792c5d************l@gmail.com
ea515d2525863e219fc7e889c04c231ba*********1@yahoo.com
b265c156bfc0d7f2525c97d10120906em********o@gmail.com
dcd4c739c5022d8c90620fa9c6d19964c********r@gmail.com
06204175df715537d52532b6ecc8be08x********d@xenophod.com
c95e2d8361b01295d709c9fe2cf54950d********7@gmail.com

Losowo wybierane adresy e-mail odtworzone z Gravatarów w serwisie jakoszczedzacpieniadze.pl

MD5 hashe-mail
9d82544d43ff9accf50fe39300fc9028r******b@wp.pl
c47dca0cae77e5c8c2a901b30dc15781m************c@wp.pl
fbef1190644f32f88bb45749450bcb4ew***************k@gmail.com
9a9370320f96b7a951bf3d55fe25e19bs*******u@gmail.com
bc9800ab3a1b22c52aa458541925bc72m*********y@op.pl
39f46f3065e18e53c65190ce9ce32223k*******o@gmail.com
87e67b133727828729fbd07723239e3fk**************i@vp.pl
64cede0752929594fe501a13b782d8b9k******9@wp.pl
9a0aec3a62926f91126d019f99c30f28r**************r@wp.pl
ac047a70fd4b5acfd4d75a432028e4c2r********8@gmail.com
69a97ace9ac43441f84fce54830190e0p**************s@gmail.com
3a5350eacbe1938c257190a43c569b68s***********l@gmail.com
8ce249ba236df4759ed7042a2c4af9dbm**********r@gazeta.pl
af1822a9827f89f6afae2fba3fc400f4a************k@gmail.com
ca52cd4d6871ebbd58635fd90f0f23afk************d@gmail.com
b95304452163db8ac64fc351a39ead52j*********8@wp.pl
5a62e00657e9a51923694482a08188f4e***********0@gmail.com
5c75b8e13fdf88787a9a2f266b60a649j*************m@gmail.com
c661c0fcea095fbca7a15dba8fea9d72j******a@poczta.fm
d582bb2886199335a0a75a644647b1e6j******o@op.pl

Zabezpieczanie haseł w systemach informatycznych

Celem artykułu jest usystematyzowanie metod zabezpieczania statycznych haseł przechowywanych na potrzeby systemów informatycznych, w szczególności serwisów internetowych, wskazanie słabych stron zaprezentowanych metod oraz wyciągnięcie wniosków w postaci zaleceń dla projektantów systemów informatycznych. Na wstępie przedstawiono pojęcie kryptograficznej funkcji skrótu, a następnie omówiono kolejne metody przechowywania haseł, pokazując ich ewolucję oraz podatności na współczesne ataki. Pokazano wyniki badań nad hasłami maskowanymi w polskich bankach oraz przedstawiono najciekawsze przykłady współczesnych funkcji adaptacyjnych. Następnie dokonano autorskiej systematyzacji metod zabezpieczania haseł oraz wskazano kierunki dalszych badań. Słowa kluczowe: informatyka, hasła, uwierzytelnianie, zabezpieczanie danych, funkcje skrótu.


Password protection in IT systems

The aim of the article is to systematise the methods of securing static passwords stored in IT systems. Pros and cons of those methods are presented and conclusions as a recommendation for IT system designers are proposed. At the beginning, the concept of cryptographic hash function is presented, following discussion of methods of storing passwords showing their evolution and susceptibility to modern attacks. Results of research on masked passwords of Polish banks IT systems
are presented, as well as the most interesting examples of adaptive password functions are given. Then, the systematisation of password protection methods was carried out. Finally, the directions for
further research are indicated.


DOI: 10.5604/01.3001.0011.8036
GICID: 01.3001.0011.8036
Biuletyn WAT 2018; 67 (1): 73-92


Link: https://biuletynwat.pl/resources/html/article/details?id=170409

Kryptograficzne funkcje skrótu

Celem artykułu jest przegląd informacji dotyczących funkcji skrótu oraz przedstawienie najnowszych osiągnięć kryptografii w tym zakresie. Wyjaśnione są podstawowe pojęcia dotyczące funkcji skrótu, ich zastosowanie oraz metody ataków. Pokazany jest bieżący stan kryptoanalizy znanych i powszechnie stosowanych funkcji skrótu: MD4, MD5, SHA. Na zakończenie omówiona jest przyszłość funkcji skrótu i zakończony konkurs na nowy standard funkcji SHA-3.


Cryptographic hash functions

The article presents a synthesis of information about the hash function and shows the latest developments in this field of cryptography. Basic concepts of the hash function are explained: definition, properties, classification, usage of the hash function and methods of attacks. The current state of cryptanalysis of known and commonly used hash functions (MD, SHA) is shown as well as consequences coming from this. At the end the attention will be paid to the future of the hash function and the current state of art in the competition for developing the new standard of SHA-3 function.


Zeszyty Naukowe Akademii Marynarki Wojennej, 2 (193), 2013, 91-102


Link: https://www.amw.gdynia.pl/images/AMW/Menu-zakladki/Nauka/Zeszyty_naukowe/Numery_archiwalne/2013/ZN_2013_2/11_Rodwald%20P.pdf

Survey PNA 2018

The results of the password security survey conducted among students at the Polish Naval Academy in 2018.

The survey was conducted at all faculties, both among military and civil students, both among Polish students (460 questionnaires) and foreign (50 questionnaires) as part of the diploma thesis.


1. The first group of questions concerns general issues related to passwords.


Do you use the same password on different websites?

AnswerNumber of answers
codemeaningquantitypercentage
TYES25755.87 %
NNO20344.13 %


How many unique passwords do you have to protect your Internet accounts/profiles?

AnswerNumber of answers
codemeaningquantitypercentage
=1=1296.30 %
2-32-323751.52 %
4-54-513028.26 %
6-6-6413.91 %


Have you ever thought about the safety of your Internet passwords?

AnswerNumber of answers
codemeaningquantitypercentage
TYES33873.48 %
NNO12226.52 %


2. The second group of questions concerns the level of difficulty for passwords belonging to particular categories.


Set the level of difficulty of the password you use (or you would use) for the following categories of Internet services: Financial services for example Internet banks

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak20.43 %
2Weak40.87 %
3Medium429.13 %
4Strong13529.35 %
5Very strong27760.22 %


Set the level of difficulty of the password you use (or you would use) for the following categories of Internet services: Social networks for example Facebook

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak30.65 %
2Weak204.35 %
3Medium11825.65 %
4Strong21847.39 %
5Very strong10121.96 %


Set the level of difficulty of the password you use (or you would use) for the following categories of Internet services: Access to email for example Gmail

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak61.30 %
2Weak235.00 %
3Medium11625.22 %
4Strong20644.78 %
5Very strong10923.70 %


Set the level of difficulty of the password you use (or you would use) for the following categories of Internet services: Entertainment services for example Netflix

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak173.70 %
2Weak4810.43 %
3Medium17337.61 %
4Strong15633.91 %
5Very strong6614.35 %


Set the level of difficulty of the password you use (or you would use) for the following categories of Internet services: Electronic commerce services for example Amazon

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak132.83 %
2Weak265.65 %
3Medium14030.43 %
4Strong17137.17 %
5Very strong11023.91 %

All above presented results on one figure (from left to right):

  • Financial services
  • Social networks
  • Access to email
  • Entertainment services
  • Electronic commerce

3. The third group of questions concerns a subjective opinion on the strength of passwords.


Password strenght 1467234690

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak449.57 %
2Weak9320.22 %
3Medium16235.22 %
4Strong12026.09 %
5Very strong418.91 %


Password strenght 19860425

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak5511.96 %
2Weak14030.43 %
3Medium16836.52 %
4Strong7616.52 %
5Very strong214.57 %


Password strenght zxcvbn12

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak163.48 %
2Weak7716.74 %
3Medium15533.70 %
4Strong15233.04 %
5Very strong6013.04 %


Password strenght Q2W3E4R5

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak183.91 %
2Weak8718.91 %
3Medium16034.78 %
4Strong14230.87 %
5Very strong5311.52 %


Password strenght qazwsxed

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak398.48 %
2Weak12627.39 %
3Medium19041.30 %
4Strong8618.70 %
5Very strong194.13 %


Password strenght KasiaNowak

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak34875.65 %
2Weak7516.30 %
3Medium245.22 %
4Strong51.09 %
5Very strong81.74 %


Password strenght K@$i@N0w@k

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak357.61 %
2Weak9420.43 %
3Medium10723.26 %
4Strong14130.65 %
5Very strong8318.04 %


Password strenght KawonAisak

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak6514.13 %
2Weak17337.61 %
3Medium17137.17 %
4Strong449.57 %
5Very strong71.52 %


Password strenght iwonka21

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak19642.61 %
2Weak18640.43 %
3Medium6113.26 %
4Strong102.17 %
5Very strong71.52 %


Password strenght KarOlcia9

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak11925.87 %
2Weak18840.87 %
3Medium11925.87 %
4Strong235.00 %
5Very strong112.39 %


Password strenght Aizuz1996!

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak4710.22 %
2Weak15433.48 %
3Medium15834.35 %
4Strong7616.52 %
5Very strong255.43 %


Password strenght RDE1095Ja

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak81.74 %
2Weak459.78 %
3Medium15233.04 %
4Strong18039.13 %
5Very strong7516.30 %


Password strenght passw0rd

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak16736.30 %
2Weak17437.83 %
3Medium8718.91 %
4Strong224.78 %
5Very strong102.17 %


Password strenght Q5!gH$?aWd

AnswerNumber of answers
codemeaningquantitypercentage
1Very weak61.30 %
2Weak91.96 %
3Medium296.30 %
4Strong12326.74 %
5Very strong29363.70 %


Comparison of strength of passwords which belongs to particular group.

In the real survey, passwords belonging to the same group were not
one next to the other.

Group 1

The first group of passwords consists of numbers only: 19860425 (8-digits) and 1467234690 (10-digits).


Group 2

The second group of passwords consists of a combination of keys located close to each other on the keyboard : zxcvbn12, Q2W3E4R5, qazwsxed.


Group 3

The third group of passwords consists of string made only from first and last names in three different forms: KasiaNowak (name and surname), K@$i@N0w@k (name and surname enriched with LeetSpeek – exchange of selected letters for special characters), KawonAisak (name and last name is a reverse).


Grupa 4

The fourth group of passwords consists of name only, enriched with: digits iwonka21; uppercase letters and digitKarOlcia9; reverse, digits and special sign Aizuz1996!.